全文获取类型
收费全文 | 5233篇 |
免费 | 374篇 |
出版年
2023年 | 48篇 |
2021年 | 27篇 |
2020年 | 149篇 |
2019年 | 66篇 |
2018年 | 98篇 |
2017年 | 172篇 |
2016年 | 230篇 |
2015年 | 131篇 |
2014年 | 181篇 |
2013年 | 823篇 |
2012年 | 195篇 |
2011年 | 191篇 |
2010年 | 138篇 |
2009年 | 198篇 |
2008年 | 195篇 |
2007年 | 186篇 |
2006年 | 213篇 |
2005年 | 119篇 |
2004年 | 159篇 |
2003年 | 140篇 |
2002年 | 137篇 |
2001年 | 69篇 |
2000年 | 69篇 |
1999年 | 65篇 |
1998年 | 76篇 |
1997年 | 65篇 |
1996年 | 91篇 |
1995年 | 77篇 |
1994年 | 89篇 |
1993年 | 73篇 |
1992年 | 72篇 |
1991年 | 69篇 |
1990年 | 61篇 |
1989年 | 52篇 |
1988年 | 55篇 |
1987年 | 55篇 |
1986年 | 44篇 |
1985年 | 47篇 |
1984年 | 43篇 |
1983年 | 36篇 |
1982年 | 63篇 |
1981年 | 48篇 |
1980年 | 48篇 |
1979年 | 47篇 |
1978年 | 63篇 |
1977年 | 67篇 |
1976年 | 50篇 |
1975年 | 42篇 |
1974年 | 35篇 |
1973年 | 28篇 |
排序方式: 共有5607条查询结果,搜索用时 15 毫秒
951.
Cynthia A. Claassen PhD Thomas Carmody PhD Robert Bossarte PhD Madhukar H. Trivedi MD Stephen Elliott MD Glenn W. Currier MD MPH 《Suicide & life-threatening behavior》2008,38(6):637-649
Fatal and nonfatal intentional self‐harm events in eight U.S. states were compared using emergency department, hospital, and vital statistics data. Nonfatal event rates increased by an estimated 24.20% over 6 years. Case fatality ratios varied widely, but two northeastern states' total event rates (fatal plus nonfatal) were very high (New Hampshire 206.5/100,000 person years; Massachusetts 166.7/100,000). Geographic context did not uniformly impact the likelihood of self‐harm across event types. The state‐level public health burden posed by such acts cannot, therefore, be accurately estimated from either mortality or morbidity data alone. 相似文献
952.
Martin Voracek DSc DMSc PhD Lisa Mariella Loibl BSc Viren Swami PhD Mona Vintilǎ PhD Kairi Kõtlves PhD Dhachayani Sinniah MD Subash Kumar Pillai MD Subramaniam Ponnusamy MD Gernot Sonneck MD Adrian Furnham DLitt DSc PhD David Lester PhD 《Suicide & life-threatening behavior》2008,38(6):688-698
The genetics of suicide is increasingly recognized and relevant for mental health literacy, but actual beliefs may lag behind current knowledge. We examined such beliefs in student samples (total N = 686) from Estonia, Malaysia, Romania, the United Kingdom, and the United States with the Beliefs in the Inheritance of Risk Factors for Suicide Scale. Cultural effects were small, those of key demographics nil. Several facets of construct validity were demonstrated. Marked differences in perceived plausibility of evidence about the genetics of suicide according to research design, observed in all samples, may be of general interest for investigating lay theories of abnormal behavior and communicating behavioral and psychiatric genetic research findings. 相似文献
953.
954.
955.
956.
The relationships of epidemiological (objective) risk indices, perceived disease characteristics, and cognitive heuristics to women's perceived susceptibility to breast cancer, heart disease, and osteoporosis in a community sample of 312 women ages 40-86 were examined. Epidemiological indices accounted for a small to moderate proportion of the variance in perceived susceptibility. Psychological factors (perceived similarity to women who contract the target disease and perceived disease prevalence) predicted perceived susceptibility above and beyond medical risk factors. Opposite to actual risk, age correlated negatively with perceived susceptibility to all 3 diseases. Exploratory analyses suggested that perceived similarity, perceived prevalence, and absent/exempt beliefs might mediate this relationship. Confirmatory factor analyses verified that measures of absolute and direct comparative risk assess the same underlying construct of perceived susceptibility. 相似文献
957.
958.
959.
960.