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   1987篇
  免费   234篇
  2221篇
  2023年   43篇
  2021年   10篇
  2020年   101篇
  2019年   23篇
  2018年   20篇
  2017年   97篇
  2016年   97篇
  2015年   77篇
  2014年   77篇
  2013年   377篇
  2012年   84篇
  2011年   52篇
  2010年   70篇
  2009年   84篇
  2008年   64篇
  2007年   47篇
  2006年   55篇
  2005年   42篇
  2004年   35篇
  2003年   26篇
  2002年   24篇
  2001年   16篇
  2000年   21篇
  1999年   22篇
  1998年   23篇
  1997年   13篇
  1996年   46篇
  1995年   35篇
  1994年   29篇
  1993年   28篇
  1992年   43篇
  1991年   44篇
  1990年   40篇
  1989年   23篇
  1988年   23篇
  1987年   20篇
  1986年   25篇
  1985年   15篇
  1984年   12篇
  1983年   17篇
  1982年   12篇
  1981年   19篇
  1980年   18篇
  1979年   31篇
  1978年   32篇
  1977年   34篇
  1976年   11篇
  1973年   6篇
  1972年   6篇
  1971年   11篇
排序方式: 共有2221条查询结果,搜索用时 0 毫秒
91.
Regional cerebral glucose metabolism in aphemia: A case report   总被引:1,自引:0,他引:1  
Local cerebral metabolism was determined in a patient suffering aphemia following cerebral infarction using the 18FDG-PET technique. The syndrome was characterized by profound ictal nonfluency with sparing of other language functions. Speech subsequently improved so that content and grammar were appropriate but mild dysprosody persisted. Conventional CT showed no lesion of the left hemisphere while PET revealed a discrete focus of hypometabolism on the left which partially resolved on serial studies. The metabolic lesion could be localized to the region of the inferior precentral gyrus and the adjacent subcortical space.  相似文献   
92.
93.
Prospective predictors of persistent nonsuicidal self‐injury (NSSI) were examined in adolescents admitted to an inpatient psychiatric unit for suicidal behaviors and followed naturalistically for 6 months. Seventy‐one (77%) participants reported NSSI at baseline, and 40 (56%) persisted at the 6 month follow‐up. Those who endorsed automatic positive reinforcement (APR) as the predominant reason for NSSI were more likely to persist in NSSI. Depression over follow‐up, but not at baseline, also predicted persistence. These results suggest that helping high‐risk adolescents to identify alternative ways of generating emotion(s) to counter the effects of APR that may accompany NSSI should be a high priority treatment target.  相似文献   
94.
Objective measures of suicide risk can convey life‐saving information to clinicians, but few such measures exist. This study examined an objective measure of fearlessness about death (FAD), testing whether FAD relates to self‐reported and physiological aversion to death. Females (= 87) reported FAD and disgust sensitivity, and facial electromyography was used to measure physiological facial responses consistent with disgust while viewing death‐related images. FAD predicted attenuated expression of physiological death aversion, even when controlling for self‐reported death‐related disgust sensitivity. Diminished physiological aversion to death‐related stimuli holds promise as an objective measure of FAD and suicide risk.  相似文献   
95.
This study was based on a sample of male high school students who completed National Longitudinal Adolescent Health Surveys in 1994, 1995, and 2001. We studied these students prospectively, comparing those who later died by suicide (= 21) with those who were still living (= 10,101). We employed chi‐square and analysis of variance tests for statistical significance between suicide decedents and living respondents. Results showed suicide decedents were more likely to have experienced the suicide loss of another family member, to have been expelled from school, to have engaged in more delinquent actions including fighting, and to have greater involvement with the criminal justice system. Although one might have expected suicide casualties to have exhibited a greater amount of suicidal thoughts, attempts, and higher incidences of suicidality among their friends, our analyses did not find that these factors were associated with actual suicides. Should these findings be replicated, this would point to a need to refine youth suicide risk assessments. Collecting life histories, as well as identifying patterns of delinquency and fighting, may serve as more potentially fruitful means for assessing genuine suicide risk than some traditional risk assessment methods.z  相似文献   
96.
Chaplains play an important role in supporting the mental health of current and former military personnel; in this study, the engagement of Department of Veterans Affairs (VA), Army, Navy, and Air Force chaplains with suicidality among their service users were examined. An online survey was used to collect data from 440 VA and 1,723 Department of Defense (DoD) chaplains as part of the VA/DoD Integrated Mental Health Strategy. Differences were noted for demographics, work setting characteristics, encountering suicidality, and self‐perceived preparation for dealing with suicidality. Compared to DoD chaplains, VA chaplains encounter more at‐risk service users, yet feel less prepared for dealing with suicidality.  相似文献   
97.
Previous study findings of psychotherapy's effect on suicide prevention have been inconsistent. This study reports the results of secondary analyses of outcome data from a short‐term depression treatment on reducing death/suicidal ideation among 158 low‐income homebound adults aged 50+. The treatment, in‐person or telehealth problem‐solving therapy (PST), compared with telephone support call, has been found effective in reducing depressive symptoms and disability among participants. Compared with support call participants, tele‐PST participants, but not in‐person PST participants, exhibited lower ideation ratings across the follow‐up period. Effect sizes at 36 weeks were 0.31 for tele‐PST and 0.17 for in‐person PST. Hopelessness mediated the effect of tele‐PST but not in‐person PST; however, in‐person PST also alleviated hopelessness, which led to lower ideation. Clinical implications of the findings are discussed.  相似文献   
98.
Past studies on suicide have investigated the association of firearm ownership and suicide risk in the United States. The aim of the present study was to build on previous work by examining the impact of firearm storage practices and the strictness of firearm regulation on suicide rates at the state level. Data were compiled from primarily three sources. Suicide and firearm ownership information was obtained from the Centers for Disease Control and Prevention. Strictness of handgun regulation was derived from figures available at the Law Center to Prevent Violence, and controls were taken from the US Bureau of the Census. Mixed models were fitted to the data. Household firearm ownership was strongly associated with both suicide by all mechanisms, and firearm suicide. Storage practices had especially elevated consequences on suicide rates. Percent with loaded guns and gun readiness increased suicide rates, and strictness of gun regulation reduced suicide rates. Ready access to firearms can make a difference between life and death. Loaded and unlocked firearms within reach become risk factors for fatal outcomes from suicidal behavior. Future research might want to examine ways of obtaining more recent data on individual firearm ownership. This study proposes several policy recommendations for suicide prevention.  相似文献   
99.
100.
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