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   2897782篇
  免费   215760篇
  国内免费   10744篇
耳鼻咽喉   39235篇
儿科学   92395篇
妇产科学   76887篇
基础医学   424212篇
口腔科学   79744篇
临床医学   266345篇
内科学   554787篇
皮肤病学   63323篇
神经病学   222513篇
特种医学   107778篇
外国民族医学   590篇
外科学   429729篇
综合类   77133篇
现状与发展   32篇
一般理论   979篇
预防医学   224110篇
眼科学   68425篇
药学   220864篇
  126篇
中国医学   12661篇
肿瘤学   162418篇
  2021年   27429篇
  2019年   26177篇
  2018年   35159篇
  2017年   27265篇
  2016年   29683篇
  2015年   34925篇
  2014年   48603篇
  2013年   69928篇
  2012年   96266篇
  2011年   102128篇
  2010年   61878篇
  2009年   57561篇
  2008年   93670篇
  2007年   99297篇
  2006年   99973篇
  2005年   96036篇
  2004年   90680篇
  2003年   86800篇
  2002年   83682篇
  2001年   132015篇
  2000年   135046篇
  1999年   113511篇
  1998年   33062篇
  1997年   28953篇
  1996年   29122篇
  1995年   27597篇
  1994年   25425篇
  1993年   23586篇
  1992年   86699篇
  1991年   84543篇
  1990年   82269篇
  1989年   79546篇
  1988年   73151篇
  1987年   71581篇
  1986年   67168篇
  1985年   64035篇
  1984年   47558篇
  1983年   40407篇
  1982年   23727篇
  1979年   43683篇
  1978年   31041篇
  1977年   25910篇
  1976年   24791篇
  1975年   26674篇
  1974年   31933篇
  1973年   30486篇
  1972年   28573篇
  1971年   26964篇
  1970年   25139篇
  1969年   23764篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
72.
73.

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   
74.
75.
76.
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   
77.
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   
78.
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   
79.
80.
Acne vulgaris (acne) is a chronic inflammatory disease of the sebaceous gland, characterized by follicular hyperkeratinization, excessive colonization by Propionibacterium acnes (Pacnes) as well as immune reactions and inflammation. Despite an armamentarium of topical treatments available including benzoyl peroxide, retinoids and azelaic acid, topical antibiotics in monotherapies, especially erythromycin and clindamycin, are still used in Europe to treat acne. This intensive use led to antimicrobial‐resistant P. acnes and staphylococci strains becoming one of the main health issues worldwide. This is an update on the current topical acne treatments available in Europe, their mechanism of action, their potential to induce antimicrobial resistance and their clinical efficacy and safety.  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