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   3085460篇
  免费   221058篇
  国内免费   4433篇
耳鼻咽喉   43244篇
儿科学   100266篇
妇产科学   83230篇
基础医学   450759篇
口腔科学   85913篇
临床医学   278544篇
内科学   591229篇
皮肤病学   68684篇
神经病学   241023篇
特种医学   117365篇
外国民族医学   676篇
外科学   464760篇
综合类   63173篇
现状与发展   13篇
一般理论   1047篇
预防医学   235792篇
眼科学   72166篇
药学   235562篇
  18篇
中国医学   6537篇
肿瘤学   170950篇
  2019年   24438篇
  2018年   34059篇
  2017年   25945篇
  2016年   29201篇
  2015年   32814篇
  2014年   46049篇
  2013年   68953篇
  2012年   94711篇
  2011年   100804篇
  2010年   59877篇
  2009年   56343篇
  2008年   94411篇
  2007年   100826篇
  2006年   101720篇
  2005年   98395篇
  2004年   94269篇
  2003年   90855篇
  2002年   87961篇
  2001年   146007篇
  2000年   150166篇
  1999年   126001篇
  1998年   35459篇
  1997年   31177篇
  1996年   31480篇
  1995年   29608篇
  1994年   27249篇
  1993年   25701篇
  1992年   97047篇
  1991年   94396篇
  1990年   92500篇
  1989年   89000篇
  1988年   81595篇
  1987年   80004篇
  1986年   75122篇
  1985年   71596篇
  1984年   53005篇
  1983年   45030篇
  1982年   26286篇
  1979年   48501篇
  1978年   34127篇
  1977年   29006篇
  1976年   27029篇
  1975年   29570篇
  1974年   35079篇
  1973年   33555篇
  1972年   31734篇
  1971年   29978篇
  1970年   27629篇
  1969年   26448篇
  1968年   24010篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
71.

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   
72.
73.
74.
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   
75.
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   
76.
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   
77.
78.
We report on a child with several café au lait spots in association with a lumbar lipomeningomyelocele as an apparently new association. Cutaneous markers, the identification of which plays a crucial role in the early diagnosis and management of spinal malformations, can accompany occult spinal dysraphism. Herein we report a case of lumbar lipomeningomyelocele associated with an overlying café au lait spot that served as a marker of occult spinal dysraphism. The patient also had segmental café au lait spots on the face, making the association unique.  相似文献   
79.
80.
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   
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