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   537篇
  免费   11篇
各国政治   47篇
工人农民   46篇
世界政治   39篇
外交国际关系   32篇
法律   236篇
中国政治   3篇
政治理论   140篇
综合类   5篇
  2024年   3篇
  2023年   4篇
  2020年   4篇
  2019年   13篇
  2018年   15篇
  2017年   11篇
  2016年   14篇
  2015年   15篇
  2014年   17篇
  2013年   69篇
  2012年   13篇
  2011年   19篇
  2010年   12篇
  2009年   19篇
  2008年   19篇
  2007年   14篇
  2006年   16篇
  2005年   22篇
  2004年   21篇
  2003年   11篇
  2002年   14篇
  2001年   13篇
  2000年   11篇
  1999年   14篇
  1998年   7篇
  1997年   8篇
  1996年   11篇
  1995年   7篇
  1994年   10篇
  1993年   13篇
  1992年   6篇
  1991年   8篇
  1990年   11篇
  1989年   9篇
  1988年   11篇
  1987年   4篇
  1986年   5篇
  1985年   8篇
  1984年   6篇
  1983年   3篇
  1979年   3篇
  1978年   3篇
  1977年   4篇
  1976年   3篇
  1974年   5篇
  1973年   3篇
  1972年   2篇
  1971年   2篇
  1964年   3篇
  1963年   1篇
排序方式: 共有548条查询结果,搜索用时 15 毫秒
421.
422.
Neuroleptic malignant syndrome (NMS) is a diagnosis of exclusion difficult to make due to a lack of pathognomonic features. Diagnosing NMS by postmortem examination becomes increasingly challenging when possible underlying brain pathology is obscured. The diagnosis is based on clinical history and laboratory findings. Autopsy and histologic findings, if any, usually are reflective of hyperthermia or complications (eg, aspiration pneumonia) of NMS. The authors describe a case of a 36-year-old Hispanic woman with a presumptive diagnosis of pseudoseizures, treated with various combinations of neuroleptic medications over a 6-week period prior to her sudden, unexpected, in-hospital death. Neuroleptic malignant syndrome is likely to have contributed to this patient's death. Confounding factors and medicolegal issues of a postmortem diagnosis of NMS are discussed.  相似文献   
423.
424.
425.
426.
Scientific research has made major contributions to adolescent health by providing insights into factors that influence it and by defining ways to improve it. However, US adolescent sexual and reproductive health policies—particularly sexuality health education policies and programs—have not benefited from the full scope of scientific understanding. From 1998 to 2009, federal funding for sexuality education focused almost exclusively on ineffective and scientifically inaccurate abstinence-only-until-marriage (AOUM) programs. Since 2010, the largest source of federal funding for sexual health education has been the “tier 1” funding of the Office of Adolescent Health’s Teen Pregnancy Prevention Initiative. To be eligible for such funds, public and private entities must choose from a list of 35 programs that have been designated as “evidence-based” interventions (EBIs), determined based on their effectiveness at preventing teen pregnancies, reducing sexually transmitted infections, or reducing rates of sexual risk behaviors (i.e., sexual activity, contraceptive use, or number of partners). Although the transition from primarily AOUM to EBI is important progress, this definition of evidence is narrow and ignores factors known to play key roles in adolescent sexual and reproductive health. Important bodies of evidence are not treated as part of the essential evidence base, including research on lesbian, gay, bisexual, transgender, queer, and questioning (LGBTQ) youth; gender; and economic inequalities and health. These bodies of evidence underscore the need for sexual health education to approach adolescent sexuality holistically, to be inclusive of all youth, and to address and mitigate the impact of structural inequities. We provide recommendations to improve US sexual health education and to strengthen the translation of science into programs and policy.  相似文献   
427.
Effects of ethnicity and neighborhood quality often are confounded in research on adolescent delinquent behavior. This study examined the pathways to delinquency among 2,277 African American and 5,973 European American youth residing in high-risk and low-risk neighborhoods. Using data from a national study of youth, a meditational model was tested in which parenting practices (parental control and maternal support) were hypothesized to influence adolescents' participation in delinquent behavior through their affiliation with deviant peers. The relationships of family and neighborhood risk to parenting practices and deviant peer affiliation were also examined. Results of multi-group structural equation models provided support for the core meditational model in both ethnic groups, as well as evidence of a direct effect of maternal support on delinquency. When a similar model was tested within each ethnic group to compare youths residing in high-risk and low-risk neighborhoods, few neighborhood differences were found. The results indicate that, for both African American and European American youth, low parental control influences delinquency indirectly through its effect on deviant peer affiliation, whereas maternal support has both direct and indirect effects. However, the contextual factors influencing parenting practices and deviant peer affiliation appear to vary somewhat across ethnic groups. Overall the present study highlights the need to look at the joint influence of neighborhood context and ethnicity on adolescent problem behavior.  相似文献   
428.
Current research in adolescent sexuality has largely focused on vaginal-penile intercourse, with less attention to noncoital sexual activity. This study examined how maternal factors influence the transition from virginity to noncoital behavior among White and Asian American youth who have never experienced vaginal intercourse. We conducted logistic regression analyses to examine whether traditional maternal predictors of coital sex were important in understanding noncoital sexual activity of these two populations. Waves 1 and 2 of the National Longitudinal Study of Adolescent Health were utilized. For White Americans (= 3,926), direct and indirect maternal factors were associated with noncoital sexual involvement: maternal support, control, mother–child communication about sex, and adolescents’ perceptions of maternal approval of sex. In contrast, only maternal support was associated with the onset of noncoital sexual behavior for Asian Americans (= 611). The study underscores the need to explore culturally specific factors that may influence Asian American adolescent noncoital sexual behaviors.
Amy G. LamEmail:
  相似文献   
429.
430.
Between 1931 and 1935 the change in the state laws governing the organizational structure of banking was significant. Twenty-two states relaxed restrictions over branch banking, even though many had previously prohibited it. We apply a model of pressure-group and rent-seeking behavior to investigate the reasons underlying this remarkable shift in the institutional arrangements for regulating the structure of the banking industry. The findings indicate that the extraordinarily high rate of bank failures tipped the political balance toward the pro-branching forces in many states. However, in a number of states growth in the influence of branch and group bankers and increases in urbanization were largely responsible for the relaxation of restrictions over branch banking.  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