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   3246968篇
  免费   245063篇
  国内免费   5673篇
耳鼻咽喉   44727篇
儿科学   106248篇
妇产科学   89733篇
基础医学   473967篇
口腔科学   89785篇
临床医学   295898篇
内科学   626843篇
皮肤病学   73003篇
神经病学   260082篇
特种医学   121689篇
外国民族医学   905篇
外科学   487665篇
综合类   72088篇
现状与发展   15篇
一般理论   1198篇
预防医学   257091篇
眼科学   75792篇
药学   238833篇
  10篇
中国医学   6861篇
肿瘤学   175271篇
  2021年   25768篇
  2019年   26604篇
  2018年   36909篇
  2017年   27797篇
  2016年   31390篇
  2015年   35250篇
  2014年   50078篇
  2013年   75122篇
  2012年   102889篇
  2011年   109875篇
  2010年   65043篇
  2009年   61588篇
  2008年   102291篇
  2007年   108786篇
  2006年   109976篇
  2005年   106749篇
  2004年   102317篇
  2003年   98118篇
  2002年   94782篇
  2001年   150383篇
  2000年   154141篇
  1999年   129267篇
  1998年   37818篇
  1997年   33457篇
  1996年   33514篇
  1995年   31643篇
  1994年   29198篇
  1993年   27428篇
  1992年   99468篇
  1991年   96592篇
  1990年   93896篇
  1989年   90459篇
  1988年   83309篇
  1987年   81330篇
  1986年   76250篇
  1985年   73183篇
  1984年   54961篇
  1983年   46695篇
  1982年   28133篇
  1979年   50121篇
  1978年   35593篇
  1977年   29649篇
  1976年   28275篇
  1975年   30018篇
  1974年   36261篇
  1973年   34552篇
  1972年   32557篇
  1971年   30496篇
  1970年   28366篇
  1969年   26828篇
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
71.
72.
Metabolism describes the series of chemical reactions that are concerned with the provision of energy to biological systems. They may be divided into reactions involved in energy yield (catabolism: demand exceeds supply), and energy storage (anabolism: supply exceeds demand). Regulation of these pathways is critical for homeostasis, and derangements in metabolism are seen in a wide variety of pathological processes. Understanding metabolism is key to the treatment of many diseases, notably diabetes, as well as underpinning clinical nutritional support.  相似文献   
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.
78.
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   
79.
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   
80.
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