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   9892篇
  免费   842篇
  国内免费   27篇
耳鼻咽喉   372篇
儿科学   247篇
妇产科学   265篇
基础医学   1275篇
口腔科学   206篇
临床医学   920篇
内科学   1990篇
皮肤病学   150篇
神经病学   1271篇
特种医学   392篇
外科学   1154篇
综合类   163篇
一般理论   10篇
预防医学   829篇
眼科学   142篇
药学   774篇
中国医学   14篇
肿瘤学   587篇
  2021年   176篇
  2020年   118篇
  2019年   165篇
  2018年   218篇
  2017年   147篇
  2016年   168篇
  2015年   195篇
  2014年   250篇
  2013年   391篇
  2012年   476篇
  2011年   545篇
  2010年   311篇
  2009年   268篇
  2008年   426篇
  2007年   473篇
  2006年   451篇
  2005年   446篇
  2004年   404篇
  2003年   367篇
  2002年   320篇
  2001年   295篇
  2000年   352篇
  1999年   293篇
  1998年   133篇
  1997年   105篇
  1996年   77篇
  1995年   86篇
  1994年   75篇
  1993年   72篇
  1992年   197篇
  1991年   159篇
  1990年   214篇
  1989年   185篇
  1988年   191篇
  1987年   182篇
  1986年   176篇
  1985年   159篇
  1984年   122篇
  1983年   110篇
  1982年   70篇
  1981年   76篇
  1980年   64篇
  1979年   102篇
  1978年   71篇
  1977年   68篇
  1975年   67篇
  1974年   56篇
  1973年   63篇
  1972年   58篇
  1971年   52篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
OBJECTIVE: To investigate the relation between psychiatric distress and road rage, paying particular attention to the potential link between psychiatric illness and frequent involvement in serious forms of road rage. METHOD: This study reports data on road rage involvement, demographic characteristics, and mental health for a representative sample of 2610 adults in Ontario. The mental health indicator was the 12-item General Health Questionnaire. RESULTS: A cluster analysis revealed 5 distinct groups of people affected by road rage. The most serious offenders (referred to hereafter as the hard core road rage group), representing 5.5% of those affected, exhibited frequent involvement in the most severe forms of road rage and were the most likely (27.5%) to report psychiatric distress. CONCLUSIONS: Road rage, particularly experiences of victimization, is related to psychiatric distress. Evidence of psychiatric distress was highest among hard core road rage perpetrators, individuals noted for frequent involvement in serious aggressive and violent conduct. Further research is needed on violence and road rage and its link to mental health.  相似文献   
75.
76.
77.
The successful implementation of a new information system is heavily dependent on the cooperation of the personnel involved. A recent study found that positive attitudes and intentions were related to high growth needs, group norms favoring the change, and considerate leadership styles of managers.  相似文献   
78.
OBJECTIVE: The goal of this study was to determine whether self-mutilators with personality disorders differ from nonmutilators with personality disorders in impulsivity, aggression, and other psychopathology and whether serotonergic dysfunction contributes to self-mutilation. METHOD: Twenty-six self-mutilators with personality disorders were matched to 26 control subjects with personality disorders for gender, age, education, axis I diagnosis of affective disorder, and axis II diagnosis of personality disorder. Numerous indexes of psychopathology as well as CSF 5-hydroxyindoleacetic acid (5-HIAA) levels and platelet imipramine binding sites (Bmax) and affinity (Kd) were determined. RESULTS: Self-mutilators had significantly more severe character pathology, had greater lifetime aggression, and were more antisocial than the control subjects. The self-mutilators scored higher on the Hamilton Rating Scale for Depression but not on the Beck Depression Inventory or the Beck Hopelessness Scale. The two groups did not differ on the Buss-Durkee Hostility and Guilt Inventory or on the Sensation Seeking Scale. The degree of self-mutilation was significantly correlated with impulsivity, chronic anger, and somatic anxiety. Both self-mutilation and impulsivity showed significant negative correlations with Bmax, although the two groups did not differ in CSF 5-HIAA levels or in platelet imipramine binding. CONCLUSIONS: The results demonstrate the contribution of severe character pathology, aggression, impulsivity, anxiety, and anger to self-mutilation and provide preliminary support for the hypothesis of underlying serotonergic dysfunction facilitating self-mutilation.  相似文献   
79.
The purpose of this study was to compare the attitudes toward basic sciences of students in a preclinical problem-based curriculum and a conventional lecture-based curriculum at the end of their second year of medical school. The results showed that the PBL class had more positive attitudes toward basic sciences than students in the conventional class. These results may reflect a learning environment where students meet many scientist role models as teachers and where basic science is learnt in the context of clinical problems.  相似文献   
80.
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