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   3224394篇
  免费   281086篇
  国内免费   14093篇
耳鼻咽喉   44855篇
儿科学   99169篇
妇产科学   83024篇
基础医学   516576篇
口腔科学   88165篇
临床医学   289016篇
内科学   563278篇
皮肤病学   86307篇
神经病学   280927篇
特种医学   128339篇
外国民族医学   209篇
外科学   505927篇
综合类   102603篇
现状与发展   25篇
一般理论   2297篇
预防医学   272725篇
眼科学   74197篇
药学   222516篇
  22篇
中国医学   9251篇
肿瘤学   150145篇
  2021年   55195篇
  2020年   35206篇
  2019年   58153篇
  2018年   70892篇
  2017年   54022篇
  2016年   59745篇
  2015年   74044篇
  2014年   108353篇
  2013年   173788篇
  2012年   91106篇
  2011年   90168篇
  2010年   116010篇
  2009年   120808篇
  2008年   77152篇
  2007年   80360篇
  2006年   90883篇
  2005年   86831篇
  2004年   88929篇
  2003年   79859篇
  2002年   69253篇
  2001年   84393篇
  2000年   76460篇
  1999年   80353篇
  1998年   63538篇
  1997年   61863篇
  1996年   59515篇
  1995年   55021篇
  1994年   49384篇
  1993年   46157篇
  1992年   57553篇
  1991年   54779篇
  1990年   51963篇
  1989年   51553篇
  1988年   48320篇
  1987年   47212篇
  1986年   45026篇
  1985年   45648篇
  1984年   43707篇
  1983年   40368篇
  1982年   40420篇
  1981年   38254篇
  1980年   36156篇
  1979年   36981篇
  1978年   33612篇
  1977年   30911篇
  1976年   28127篇
  1975年   26628篇
  1974年   27774篇
  1973年   26677篇
  1972年   25091篇
排序方式: 共有10000条查询结果,搜索用时 4 毫秒
171.
172.
173.
174.
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   
175.
176.

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   
177.
178.
179.
180.
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   
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