全文获取类型
收费全文 | 340篇 |
免费 | 4篇 |
专业分类
各国政治 | 11篇 |
工人农民 | 16篇 |
世界政治 | 31篇 |
外交国际关系 | 25篇 |
法律 | 119篇 |
中国政治 | 4篇 |
政治理论 | 134篇 |
综合类 | 4篇 |
出版年
2021年 | 3篇 |
2020年 | 2篇 |
2019年 | 7篇 |
2018年 | 3篇 |
2017年 | 7篇 |
2016年 | 7篇 |
2015年 | 4篇 |
2014年 | 6篇 |
2013年 | 42篇 |
2012年 | 3篇 |
2011年 | 16篇 |
2010年 | 11篇 |
2009年 | 7篇 |
2008年 | 8篇 |
2007年 | 11篇 |
2006年 | 7篇 |
2005年 | 9篇 |
2004年 | 10篇 |
2003年 | 11篇 |
2002年 | 16篇 |
2001年 | 11篇 |
2000年 | 9篇 |
1999年 | 3篇 |
1998年 | 8篇 |
1997年 | 14篇 |
1996年 | 4篇 |
1995年 | 5篇 |
1993年 | 2篇 |
1992年 | 7篇 |
1991年 | 7篇 |
1990年 | 4篇 |
1989年 | 6篇 |
1988年 | 4篇 |
1987年 | 9篇 |
1986年 | 10篇 |
1985年 | 4篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 4篇 |
1980年 | 5篇 |
1978年 | 2篇 |
1974年 | 2篇 |
1973年 | 4篇 |
1971年 | 2篇 |
1970年 | 2篇 |
1969年 | 5篇 |
1968年 | 4篇 |
1967年 | 2篇 |
1965年 | 1篇 |
排序方式: 共有344条查询结果,搜索用时 46 毫秒
11.
W J Nelson 《Social security bulletin》1992,55(3):41-58
About 93.1 million workers were covered under workers' compensation laws in 1988--an increase of 11 percent from the 1984 total. Benefit amounts totaled $30.7 billion--an increase of about 56 percent since 1984. Of the total payments made under the workers' compensation program, $17.6 billion went to disabled workers, $1.6 billion to their survivors, and $11.5 billion for medical care. The Social Security Administration (SSA) is interested in measuring economic security in the United States, and workers' compensation plays a large role in that measurement. This article represents one part of our overall effort to determine the roles the various income-maintenance programs play in helping citizens of the United States achieve economic security. The figures presented here provide readers with an opportunity to review workers' compensation program operations during much of the 1980's. Workers' compensation is also important to SSA because that program is directly related to the Social Security Disability Insurance program. Since 1965, Social Security disability benefits have been subject to reduction if the beneficiary also receives workers' compensation and the combined benefits exceed 80 percent of previous earnings. In addition, SSA has been directly involved in providing income maintenance for disability from work-related diseases since 1969 when the Federal Black Lung benefits program was established. 相似文献
12.
W J Nelson 《Social security bulletin》1988,51(1):4-9
The 84.3 million workers protected by workers' compensation laws in 1985 represented 87 percent of all wage and salary workers in that year. Both the amount of benefits paid to workers and the cost of the program to employers rose substantially from 1984 to 1985. Benefit payments totaled $22.5 billion-14.1 percent higher than in 1984 and the largest annual increase since 1978-79. About two-thirds of the payments in 1985 were money payments ($15.1 billion) and the remainder ($7.4 billion) went for medical care for disabled workers. Private insurance companies made nearly three-fifths of these payments and State funds and self-insured employers each paid about one-fifth of the total benefit amount in 1985. For the first time since 1978, the annual growth in employer costs exceeded the growth in workers' benefits, resulting in a slight decrease in the loss ratio for 1984-85. Employer costs were up nearly 17 percent from the previous year, reaching an estimated $29.3 billion. Covered payrolls increased by 7 percent in that same period. Total benefit payments as a percent of payroll also increased noticeably in 1985. 相似文献
13.
14.
15.
16.
17.
Sharma AN Nelson LS Hoffman RS 《The American journal of forensic medicine and pathology》2004,25(2):156-158
The neurologic manifestations of thallium poisoning include a severely painful ascending peripheral neuropathy, autonomic dysfunction, cranial nerve abnormalities, and a toxic encephalopathy. Although thallium has a short half-life, these neurologic manifestations commonly progress, even as the blood concentration of thallium decreases. This suggests either that thallium persists in neuronal tissues or that it initiates an injury cascade that takes time to fully manifest. As the latter mechanism is consistent with many toxin exposures, the concept of a central nervous system reservoir for thallium is often discounted. A recent case provided a unique opportunity to evaluate this possibility. A 48-year-old man was acutely and chronically thallium poisoned by his common-law wife. During his initial exposures, only gastrointestinal symptoms manifested. Following an acute ingestion, hospitalization was required. Over 3 days, his symptoms rapidly progressed from a severely painful neuropathy to slurred speech, ptosis, confusion, coma, respiratory insufficiency, and death. Because of considerations of alternative diagnoses, 2 lumbar punctures were performed, one on admission and another on the day of his death. Serum thallium concentrations obtained from stored blood samples were paired with spinal fluid concentrations from the same days. On day 1, serum and spinal fluid concentrations were 8700 mu/L and 1200 mu/L, respectively. On day 3, although the serum concentration had fallen to 7200 mu/L, the spinal fluid concentration had increased to 2100 mu/L. This case provides evidence to support the hypothesis that thallium distributes into the central nervous system more slowly than the blood compartment, and this may in part account for the progression of neurologic findings in the setting of decreasing serum concentrations. 相似文献
18.
Investigating why people use the hospital emergency department (ED) for visits considered medically nonurgent can enhance our understanding of people's expectations of health care services, of their conceptions of prudent lay judgment, and of difficulties in negotiating the logistics of primary care services. This study identified reasons for such ED use from users' perspectives in both pediatric and adult visits. Respondents were asked to explain what brought them to the ED and to define an emergency. The study was conducted in two northeastern U.S. hospital EDs. The analysis drew on a convenience sample of 408 (331 pediatric, 77 adult users) face-to-face interviews that employed both open- and closed-ended questions. Findings indicate most patients had medical insurance and a regular place of care and most arrived by car or taxi. Twelve main themes emerged under three main categories: conceptions of needs, appropriateness, and preference for the ED. The findings indicate that various reasons for ED use may be construed as access issues. These include beliefs regarding limited availability of after-hour consultation services and of timely appointments at one's primary care site. Drawing on the findings, a typology that distinguishes between groups of users according to their preference for the ED, a level of congruence between their own reason and their definition of an emergency was developed. The typology suggests that people's concerns that influence their decision to come to the ED cannot be solved simply by expanding primary care services or by educational interventions. Its application yields recommendations for services and interventions. 相似文献
19.
Baker AM Johnson DG Levisky JA Hearn WL Moore KA Levine B Nelson SJ 《Journal of forensic sciences》2003,48(2):425-428
Diphenhydramine is an antihistamine available in numerous over-the-counter preparations. Often used for its sedative effects in adults, it can cause paradoxical central nervous system stimulation in children, with effects ranging from excitation to seizures and death. Reports of fatal intoxications in young children are rare. We present five cases of fatal intoxication in infants 6, 8, 9, 12, and 12 weeks old. Postmortem blood diphenhydramine levels in the cases were 1.6, 1.5, 1.6, 1.1 and 1.1 mg/L, respectively. Anatomic findings in each case were normal. In one case the child's father admitted giving the infant diphenhydramine in an attempt to induce the infant to sleep; in another case, a daycare provider admitted putting diphenhydramine in a baby bottle. Two cases remain unsolved; one case remains under investigation. The postmortem drug levels in these cases are lower than seen in adult fatalities. We review the literature on diphenhydramine toxicity, particularly as it pertains to small children, and discuss the rationale for treating these cases as fatal intoxications. 相似文献