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   2364882篇
  免费   175368篇
  国内免费   3359篇
耳鼻咽喉   32738篇
儿科学   76383篇
妇产科学   64311篇
基础医学   350664篇
口腔科学   64422篇
临床医学   211989篇
内科学   460308篇
皮肤病学   52244篇
神经病学   186988篇
特种医学   88251篇
外国民族医学   489篇
外科学   355474篇
综合类   47576篇
现状与发展   12篇
一般理论   849篇
预防医学   184074篇
眼科学   55182篇
药学   177457篇
  11篇
中国医学   4600篇
肿瘤学   129587篇
  2021年   19080篇
  2019年   19721篇
  2018年   27384篇
  2017年   20603篇
  2016年   23024篇
  2015年   25937篇
  2014年   36538篇
  2013年   54581篇
  2012年   75535篇
  2011年   80396篇
  2010年   47531篇
  2009年   44792篇
  2008年   75215篇
  2007年   80257篇
  2006年   81158篇
  2005年   78609篇
  2004年   75292篇
  2003年   72581篇
  2002年   70138篇
  2001年   109117篇
  2000年   111850篇
  1999年   93829篇
  1998年   27084篇
  1997年   23675篇
  1996年   24075篇
  1995年   22739篇
  1994年   20907篇
  1993年   19723篇
  1992年   72215篇
  1991年   70264篇
  1990年   68614篇
  1989年   65907篇
  1988年   60636篇
  1987年   59426篇
  1986年   55502篇
  1985年   53282篇
  1984年   39533篇
  1983年   33556篇
  1982年   19929篇
  1979年   36216篇
  1978年   25877篇
  1977年   21425篇
  1976年   20522篇
  1975年   22064篇
  1974年   26526篇
  1973年   25157篇
  1972年   23522篇
  1971年   22335篇
  1970年   20534篇
  1969年   19606篇
排序方式: 共有10000条查询结果,搜索用时 15 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