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   2346733篇
  免费   175051篇
  国内免费   3319篇
耳鼻咽喉   32055篇
儿科学   75908篇
妇产科学   62689篇
基础医学   348292篇
口腔科学   63645篇
临床医学   211384篇
内科学   457319篇
皮肤病学   51730篇
神经病学   185282篇
特种医学   88011篇
外国民族医学   489篇
外科学   353890篇
综合类   47508篇
现状与发展   12篇
一般理论   849篇
预防医学   182758篇
眼科学   54332篇
药学   175112篇
  11篇
中国医学   4575篇
肿瘤学   129252篇
  2021年   18982篇
  2019年   19540篇
  2018年   27062篇
  2017年   20360篇
  2016年   22753篇
  2015年   25651篇
  2014年   36102篇
  2013年   53971篇
  2012年   74686篇
  2011年   79415篇
  2010年   47078篇
  2009年   44572篇
  2008年   74621篇
  2007年   79484篇
  2006年   80308篇
  2005年   77789篇
  2004年   74383篇
  2003年   71700篇
  2002年   69379篇
  2001年   108754篇
  2000年   111466篇
  1999年   93510篇
  1998年   26994篇
  1997年   23669篇
  1996年   24059篇
  1995年   22723篇
  1994年   20898篇
  1993年   19717篇
  1992年   72010篇
  1991年   70080篇
  1990年   68403篇
  1989年   65675篇
  1988年   60316篇
  1987年   59133篇
  1986年   55230篇
  1985年   53012篇
  1984年   39315篇
  1983年   33403篇
  1982年   19860篇
  1979年   35871篇
  1978年   25651篇
  1977年   21233篇
  1976年   20334篇
  1975年   21816篇
  1974年   26148篇
  1973年   24803篇
  1972年   23201篇
  1971年   22037篇
  1970年   20254篇
  1969年   19316篇
排序方式: 共有10000条查询结果,搜索用时 21 毫秒
51.

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   
52.
53.
54.
While previous randomised controlled trials and meta-analyses offer only limited evidence for the effectiveness of cognitive rehabilitation, qualitative studies examining patient perspectives report more positive outcomes. This meta-synthesis of qualitative studies examined patient perspectives of cognitive rehabilitation for memory, attention, and executive function problems in people with multiple sclerosis. Using set eligibility criteria, we screened electronic databases, reference lists, and academic networks for relevant papers. Seven papers (195 participants) were selected. Two independent researchers conducted quality appraisals of papers. Data analysis, guided by the thematic synthesis approach, yielded six main themes. These suggested that patients benefitted from the group environment in rehabilitation. Cognitive rehabilitation facilitated the participants’ reflection and awareness of their cognitive deficits, and was associated with increased knowledge and understanding of their illness. Increased strategy use was reported and associated with improvements in cognitive functioning and greater confidence and perseverance. Participants reported emotional and social improvements, and felt more optimistic. Overall, these changes had a positive impact on participants’ quality of life. This synthesis of qualitative studies indicates that people with multiple sclerosis who experience cognitive deficits benefit from cognitive rehabilitation programmes. This finding must, however, be viewed in light of the limitations of this meta-synthesis. The meta-synthesis was registered in the PROSPERO database under CRD42017040148.  相似文献   
55.
We report two British cases of liver abscess, due to Klebsiella pneumoniae and associated with synchronous infection elsewhere, which required liver resection for definitive treatment. They illustrate the geographic spread of aggressive K pneumoniae liver infection and demonstrate the importance of early aggressive treatment.  相似文献   
56.
Henna, derived from a combination of natural leaves and coloring additives, is a common decorative dye traditionally used in many Islamic religious celebrations. Para‐phenylenediamine (PPD), a major component of black henna tattoo, is a strong sensitizer and common allergen. We report a case of severe connubial allergic contact dermatitis after black henna heterotransfer in a girl.  相似文献   
57.
58.
59.
Dosage form is a mean used for the delivery of drug to a living body. In order to get the desired effect the drug should be delivered to its site of action at such rate and concentration to achieve the maximum therapeutic effect and minimum adverse effect. Since oral route is still widely accepted route but having a common drawback of difficulty in swallowing of tablets and capsules. Therefore a lot of research has been done on novel drug delivery systems. This review is about oral dispersible tablets a novel approach in drug delivery systems that are now a day''s more focused in formulation world, and laid a new path that, helped the patients to build their compliance level with the therapy, also reduced the cost and ease the administration especially in case of pediatrics and geriatrics. Quick absorption, rapid onset of action and reduction in drug loss properties are the basic advantages of this dosage form.  相似文献   
60.
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