首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   25735篇
  免费   799篇
  国内免费   5篇
各国政治   996篇
工人农民   1162篇
世界政治   1675篇
外交国际关系   880篇
法律   16219篇
中国共产党   40篇
中国政治   265篇
政治理论   4991篇
综合类   311篇
  2021年   149篇
  2020年   348篇
  2019年   388篇
  2018年   532篇
  2017年   627篇
  2016年   660篇
  2015年   504篇
  2014年   518篇
  2013年   2357篇
  2012年   668篇
  2011年   733篇
  2010年   603篇
  2009年   683篇
  2008年   780篇
  2007年   872篇
  2006年   827篇
  2005年   736篇
  2004年   738篇
  2003年   710篇
  2002年   645篇
  2001年   942篇
  2000年   824篇
  1999年   688篇
  1998年   392篇
  1997年   277篇
  1996年   333篇
  1995年   276篇
  1994年   318篇
  1993年   309篇
  1992年   475篇
  1991年   557篇
  1990年   515篇
  1989年   455篇
  1988年   503篇
  1987年   445篇
  1986年   510篇
  1985年   450篇
  1984年   373篇
  1983年   359篇
  1982年   268篇
  1981年   306篇
  1980年   231篇
  1979年   264篇
  1978年   210篇
  1977年   179篇
  1976年   163篇
  1975年   182篇
  1974年   188篇
  1973年   172篇
  1972年   142篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
901.
This article explores the potential of using children’s perceptions of distance to reflect a gendered understanding of remoteness. Data collected from 1,549 children in Tanzania concerning their perceptions of remoteness in relation to accessibility of school, health care, and water resources were analysed in reference to their impact on school attendance and performance. Gendered variability in perceived distances to services by children may indicate that remoteness is as much of a social issue as it is a geographic phenomenon, in that girls perceive distance and time between home and destination to be further than boys who travel approximately the same distance.  相似文献   
902.

Young adulthood represents a developmental period with disproportionately heightened risk of losing a job. Young adult unemployment has been linked to increased mental health problems, at least in the short term. However, their possible long-term impacts, often referred as “scarring effects,” have been understudied, possibly underestimating the magnitude of mental health burden that young adult unemployment generates. This longitudinal study examined whether duration of unemployment during young adulthood is associated with later mental health disorders, after accounting for mental and behavioral health problems in childhood. Furthermore, the current study investigated whether childhood neighborhood characteristics affect this association and if so, in what specific functional ways. Data were drawn from a longitudinal study of developmental outcomes in a community sample in Seattle. Data collection began in 1985 when study participants were elementary students and involved yearly assessments in childhood and adolescence (ages 10–16) and then biennial or triennial assessments (ages 18–39; N?=?677 at age 39; 47% European American, 26% African American, 22% Asian American, and 5% Native American; 49% female). The current study findings suggest that duration of unemployment across young adulthood increased mental health problems at age 39, regardless of gender. Childhood neighborhood characteristics, particularly their positive aspect, exerted independent impacts on adult mental health problems beyond unemployment experiences across young adulthood. The current findings indicate a needed shift in service profiles for unemployed young adults—a comprehensive approach that not only facilitates reemployment but also addresses mental health needs to help them to cope with job loss. Further, the present study findings suggest that childhood neighborhoods, particularly positive features such as positive neighborhood involvement, may represent concrete and malleable prevention targets that can curb mental health problems early in life.

  相似文献   
903.

There is strong evidence that chronic, systemic inflammation hastens onset of the diseases of old age that ultimately lead to death. Importantly, several studies suggest that childhood adversity predicts chronic inflammation. Unfortunately, this research has been plagued by retrospective reports of childhood adversity, an absence of controls for adult stressors, and a failure to investigate various competing models of the link between childhood adversity and chronic inflammation. The present study was designed to address these limitations. Using 18 years of data collected from 413 African Americans (58% female) included in the Family and Community Health Study, hierarchical regression analyses provided support for a nuanced early life sensitivity explanation for the link between early adversity and adult chronic inflammation. Controlling for health risk behaviors and adult SES, late childhood (ages 10–12) adversity amplified the association between adult adversity (age 29) and chronic inflammation. This interaction operated in a domain-specific fashion. Harsh parenting amplified the relation between intimate partner hostility and inflammation, whereas early discrimination amplified the relation between adult discrimination and inflammation. These findings suggest that individuals may be primed to respond physiologically to adverse adult circumstances that resemble those experienced earlier in life.

  相似文献   
904.
Journal of Youth and Adolescence - The development of social behavior could be affected by stressful parenting. The mineralocorticoid receptor, one of the two main receptors for the stress hormone...  相似文献   
905.
Journal of Youth and Adolescence - Adolescents experience high rates of mental health problems but are reluctant to seek professional help. Parents play an integral role in the help seeking process...  相似文献   
906.
Journal of Youth and Adolescence - In the original publication, the legends for Figs 4 and 5 were incorrect, such that each regression line was mislabeled with the incorrect country. Below are the...  相似文献   
907.

Research on the health benefits and consequences of close relationships has suggested the linkage in daily emotions (i.e., coregulation) between close partners is an important relationship dynamic. While the coupling of daily emotions among family members (parent–child and marital dyads) has been widely documented, research examining emotional coregulation among ethnic minority youth during adolescence, a period marked by heightened emotion and risk for psychopathology, remains an important area in need of exploration. This study examined correlates of emotional coregulation in a sample of Mexican-origin adolescents (Mage?=?15.02, SD?=?.83) and their parents (Mage?=?41.93, SD?=?6.70). Dyads reported on daily levels of distress and happiness for 14 consecutive days across two waves of data collection a year apart (nwave1?=?428 dyads, nwave2?=?336 dyads). Dyads who reported getting along were more likely to coregulate their daily happiness. Importantly, coregulation of distress was only present in older adolescents who reported above average levels of internalizing symptoms. The results suggest coregulation of distress may shape or be shaped by poor mental health during the later years of adolescence, a time when youth may be establishing a degree of emotional autonomy from parents.

  相似文献   
908.

Drawing from Race-Based Traumatic Stress theory, the present study examined whether traumatic stress and depressive symptoms differentially help explain the relation between racial/ethnic discrimination and suicidal ideation across gender and racial/ethnic groups. A racially/ethnically diverse group of emerging adults (N?=?1344; Mage?=?19.88, SD?=?2.25; 72% female; 46% Hispanic) completed a battery of self-report measures. A cross-sectional design was employed with a series of hierarchical linear regression models and bootstrapping procedures to examine the direct and indirect relation between racial/ethnic discrimination and suicidal ideation through traumatic stress and depressive symptoms across gender and race/ethnicity. The findings suggest an indirect relation through depressive symptoms, but not traumatic stress, and a serial indirect relation through traumatic stress to depressive symptoms in young women and young men, the latter of which was stronger in young women. The indirect relations did not vary by racial/ethnic group. Cumulative experiences of racial/ethnic discrimination may impact suicide-related risk via increases in psychiatric symptomology (i.e., traumatic stress and depressive symptoms), particularly in young women. Racial/ethnic discrimination experiences should be accounted for as a potential source of psychological distress in the assessment, diagnosis, and treatment of suicidal thoughts and behavior, especially among young women endorsing traumatic stress and depressive symptoms. Further research is warranted to better understand the gender difference in the relation between racial/ethnic discrimination and suicide-related risk.

  相似文献   
909.

Across industrialized nations, children and teens are a highly prized target for the advertising industry because young people have a tremendous influence on family purchases; however, media scholars have long suggested that young people are a fundamentally vulnerable audience because they lack the necessary developmental competencies to adequately process and protect themselves from advertising communications. Yet, the precise developmental mechanisms have not been clearly articulated nor is there a clear understanding of how these competencies extend across childhood contexts (e.g., developmental phase, cultures). The current study seeks to lend clarity to this matter by looking at the potential influence that children’s executive function and emotion regulation have on the relationship between television exposure (as a proxy of exposure to advertising messages and other consumption-oriented media content) and consumer behavior across a broad range of ages from two wealthy industrialized countries. Mothers of young elementary school children (5–8 years) and early adolescents (9–12 years) in the Netherlands (N?=?333, 51.7% female child) and the United States of America (N?=?810, 49.6% female child) took part in an online survey to report on their child’s cognitive/affective development, media use, and consumer behavior (i.e., purchase requests, purchase related conflict). The results showed that across ages, executive function via attentional shifting moderated the link between purchase requests and purchase conflict, whereas positively valenced emotion regulation moderated the same relationship but only for older children. Lastly, the findings revealed that while there are differences in reported behavior among children in these two countries, the developmental processes tend to work in the same manner. The discussion focuses on what these findings mean for children’s consumer development as they approach adolescence and how researchers and child advocates should take these developmental factors into account when considering children’s potential vulnerability as consumers.

  相似文献   
910.
Both leadership and public value are increasingly seen as concepts highly relevant to public administration, not only because of complex societal challenges but also as ways to address pluralistic interests in society. This article explores in detail the varied conceptualizations of public value and of public leadership. Furthermore, we argue that political astuteness provides an important conceptual linkage between leadership and public value, enabling actors to read, understand and foster coalitions around diverse and sometimes competing interests. In this introduction to the symposium, we analyse the different conceptualizations of public value, of leadership, and also show how the six articles explicitly or implicitly draw on the linking concept of political astuteness. The article assesses how the six articles of the symposium contribute to each of these three concepts.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号