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   4323293篇
  免费   374313篇
  国内免费   15526篇
耳鼻咽喉   61872篇
儿科学   134492篇
妇产科学   113336篇
基础医学   658019篇
口腔科学   121167篇
临床医学   403588篇
内科学   784869篇
皮肤病学   105537篇
神经病学   372796篇
特种医学   171898篇
外国民族医学   912篇
外科学   660065篇
综合类   126364篇
现状与发展   58篇
一般理论   2637篇
预防医学   370157篇
眼科学   102196篇
药学   303596篇
  24篇
中国医学   11393篇
肿瘤学   208156篇
  2021年   56806篇
  2020年   37727篇
  2019年   59501篇
  2018年   76580篇
  2017年   59570篇
  2016年   65966篇
  2015年   79099篇
  2014年   114747篇
  2013年   180529篇
  2012年   121124篇
  2011年   124294篇
  2010年   126289篇
  2009年   130044篇
  2008年   110896篇
  2007年   117022篇
  2006年   126645篇
  2005年   121213篇
  2004年   121717篇
  2003年   112133篇
  2002年   102512篇
  2001年   154935篇
  2000年   150801篇
  1999年   140117篇
  1998年   72106篇
  1997年   68397篇
  1996年   66203篇
  1995年   61944篇
  1994年   55840篇
  1993年   51864篇
  1992年   103752篇
  1991年   99103篇
  1990年   94206篇
  1989年   91772篇
  1988年   85384篇
  1987年   83836篇
  1986年   79521篇
  1985年   77945篇
  1984年   65973篇
  1983年   58891篇
  1982年   48161篇
  1981年   44901篇
  1980年   42185篇
  1979年   57828篇
  1978年   47041篇
  1977年   41605篇
  1976年   38666篇
  1975年   37854篇
  1974年   42416篇
  1973年   40555篇
  1972年   38021篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
181.
182.

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   
183.
184.
185.
186.
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   
187.
188.
Sorsby fundus dystrophy (SFD), an autosomal dominant, fully penetrant, degenerative disease of the macula, is manifested by symptoms of night blindness or sudden loss of visual acuity, usually in the third to fourth decades of life due to choroidal neovascularization (CNV). SFD is caused by specific mutations in the Tissue Inhibitor of Metalloproteinase-3, (TIMP3) gene. The predominant histo-pathological feature in the eyes of patients with SFD are confluent 20–30 m thick, amorphous deposits found between the basement membrane of the retinal pigment epithelium (RPE) and the inner collagenous layer of Bruch's membrane. SFD is a rare disease but it has generated significant interest because it closely resembles the exudative or “wet” form of the more common age-related macular degeneration (AMD). In addition, in both SFD and AMD donor eyes, sub-retinal deposits have been shown to accumulate TIMP3 protein. Understanding the molecular functions of wild-type and mutant TIMP3 will provide significant insights into the patho-physiology of SFD and perhaps AMD. This review summarizes the current knowledge on TIMP3 and how mutations in TIMP3 cause SFD to provide insights into how we can study this disease going forward. Findings from these studies could have potential therapeutic implications for both SFD and AMD.  相似文献   
189.
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