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   4369975篇
  免费   360176篇
  国内免费   14649篇
耳鼻咽喉   61327篇
儿科学   139572篇
妇产科学   113318篇
基础医学   666822篇
口腔科学   116551篇
临床医学   404423篇
内科学   794237篇
皮肤病学   111385篇
神经病学   366480篇
特种医学   169218篇
外国民族医学   512篇
外科学   678289篇
综合类   121364篇
现状与发展   91篇
一般理论   2783篇
预防医学   363537篇
眼科学   103922篇
药学   303275篇
  26篇
中国医学   11540篇
肿瘤学   216128篇
  2021年   58052篇
  2020年   38597篇
  2019年   60313篇
  2018年   78431篇
  2017年   60267篇
  2016年   66784篇
  2015年   79582篇
  2014年   117143篇
  2013年   182867篇
  2012年   133011篇
  2011年   139922篇
  2010年   133223篇
  2009年   134711篇
  2008年   125053篇
  2007年   132733篇
  2006年   141752篇
  2005年   136053篇
  2004年   135416篇
  2003年   124990篇
  2002年   113617篇
  2001年   151500篇
  2000年   145865篇
  1999年   135811篇
  1998年   72040篇
  1997年   67816篇
  1996年   65613篇
  1995年   60768篇
  1994年   54540篇
  1993年   50643篇
  1992年   96631篇
  1991年   93272篇
  1990年   89562篇
  1989年   87372篇
  1988年   80506篇
  1987年   78987篇
  1986年   74321篇
  1985年   73381篇
  1984年   62026篇
  1983年   55738篇
  1982年   46340篇
  1981年   43398篇
  1980年   40757篇
  1979年   53284篇
  1978年   44215篇
  1977年   39042篇
  1976年   36415篇
  1975年   36391篇
  1974年   39549篇
  1973年   37760篇
  1972年   35385篇
排序方式: 共有10000条查询结果,搜索用时 232 毫秒
181.
182.
183.
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   
184.
185.

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   
186.
187.
188.
189.
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   
190.
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