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   9025篇
  免费   695篇
  国内免费   117篇
耳鼻咽喉   205篇
儿科学   307篇
妇产科学   243篇
基础医学   1140篇
口腔科学   247篇
临床医学   957篇
内科学   1819篇
皮肤病学   60篇
神经病学   916篇
特种医学   300篇
外国民族医学   2篇
外科学   1388篇
综合类   195篇
一般理论   6篇
预防医学   809篇
眼科学   143篇
药学   574篇
  2篇
中国医学   9篇
肿瘤学   515篇
  2021年   114篇
  2020年   78篇
  2019年   125篇
  2018年   125篇
  2017年   95篇
  2016年   103篇
  2015年   157篇
  2014年   184篇
  2013年   256篇
  2012年   370篇
  2011年   433篇
  2010年   267篇
  2009年   238篇
  2008年   367篇
  2007年   442篇
  2006年   341篇
  2005年   382篇
  2004年   348篇
  2003年   338篇
  2002年   345篇
  2001年   290篇
  2000年   287篇
  1999年   238篇
  1998年   131篇
  1997年   117篇
  1996年   109篇
  1995年   102篇
  1994年   90篇
  1993年   91篇
  1992年   219篇
  1991年   214篇
  1990年   214篇
  1989年   195篇
  1988年   183篇
  1987年   186篇
  1986年   190篇
  1985年   168篇
  1984年   127篇
  1983年   108篇
  1982年   77篇
  1980年   72篇
  1979年   130篇
  1978年   98篇
  1977年   72篇
  1976年   84篇
  1975年   85篇
  1974年   80篇
  1973年   76篇
  1972年   90篇
  1971年   76篇
排序方式: 共有9837条查询结果,搜索用时 31 毫秒
1.

Introduction

Several studies demonstrated that simulator-acquired skill transfer to the operating room is incomplete. Our objective was to identify trainee characteristics that predict the transfer of simulator-acquired skill to the operating room.

Methods

Trainees completed baseline assessments including intracorporeal suturing (IS) performance, attentional selectivity, self-reported use of mental skills, and self-reported prior clinical and simulated laparoscopic experience and confidence. Residents then followed proficiency-based laparoscopic skills training, and their skill transfer was assessed on a live-anesthetized porcine model. Predictive characteristics for transfer test performance were assessed using multiple linear regression.

Results

Thirty-eight residents completed the study. Automaticity, attentional selectivity, resident perceived ability with laparoscopy and simulators, and post-training IS performance were predictive of IS performance during the transfer test.

Conclusions

Promoting automaticity, self-efficacy, and attention selectivity may help improve the transfer of simulator-acquired skill. Mental skills training and training to automaticity may therefore be valuable interventions to achieve this goal.  相似文献   
2.
ContextIt is especially important that patients are well informed when making high-stakes, preference-sensitive decisions like those on the Physician Orders for Life-Sustaining Treatment (POLST) form. However, there is currently no way to easily evaluate whether patients understand key concepts when making these important decisions.ObjectivesTo develop a POLST knowledge survey.MethodsExpert (n = 62) ratings of key POLST facts were used to select items for a POLST knowledge survey. The survey was administered to nursing facility residents (n = 97) and surrogate decision-makers (n = 112). A subset (n = 135) were re-administered the survey after a standardized advance care planning discussion to assess the scale's responsiveness to change.ResultsThe 19-item survey demonstrated adequate reliability (α = 0.72.). Residents' scores (x = 11.4, standard deviation 3.3) were significantly lower than surrogate scores (x = 14.7, standard deviation 2.5) (P < 0.001). Scores for both groups increased significantly after administration of a standardized advance care planning discussion (P < 0.001). Although being a surrogate, age, race, education, cognitive functioning, and health literacy were significantly associated with higher POLST Knowledge Survey scores in univariate analyses, only being a surrogate (P < 0.001) and being white (P = 0.028) remained significantly associated with higher scores in multivariate analyses.ConclusionThe 19-item POLST Knowledge Survey demonstrated adequate reliability and responsiveness to change. Findings suggest the survey could be used to identify knowledge deficits and provide targeted education to ensure adequate understanding of key clinical decisions when completing POLST.  相似文献   
3.
4.
The resolution of three 2-substituted derivatives of idazoxan is described. The enantiomers show large separations in activity in a variety of in vitro and in vivo tests, and the active isomers are all potent and selective antagonists at the alpha 2-adrenoreceptor. The significance of these results in relation to those published on the enantiomers of idazoxan and to those on optically active alpha 2-adrenoreceptor agonists is discussed.  相似文献   
5.
6.
Smoking behavior among participants in the nurses' health study.   总被引:2,自引:1,他引:1       下载免费PDF全文
We analyzed smoking behavior of 91,651 married female nurses, aged 30-55 years in 1976. The prevalence of smoking was similar among all birth cohorts. The largest percentage increase in starting to smoke occurred between ages 15 and 25 years; by age 25, 50 per cent had started smoking. The cessation rate was lowest in earlier birth cohorts and among nurses starting to smoke at earlier ages. The cessation rate increased substantially between 1963-73 compared with the period 1948-58.  相似文献   
7.
8.
9.
10.
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