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   2928篇
  免费   259篇
  国内免费   86篇
耳鼻咽喉   3篇
儿科学   9篇
妇产科学   13篇
基础医学   89篇
口腔科学   22篇
临床医学   256篇
内科学   187篇
皮肤病学   8篇
神经病学   26篇
特种医学   28篇
外科学   126篇
综合类   860篇
一般理论   2篇
预防医学   1118篇
眼科学   8篇
药学   250篇
  28篇
中国医学   210篇
肿瘤学   30篇
  2024年   14篇
  2023年   54篇
  2022年   111篇
  2021年   126篇
  2020年   140篇
  2019年   80篇
  2018年   105篇
  2017年   93篇
  2016年   95篇
  2015年   110篇
  2014年   239篇
  2013年   206篇
  2012年   243篇
  2011年   294篇
  2010年   156篇
  2009年   160篇
  2008年   183篇
  2007年   205篇
  2006年   174篇
  2005年   153篇
  2004年   91篇
  2003年   58篇
  2002年   51篇
  2001年   27篇
  2000年   27篇
  1999年   12篇
  1998年   14篇
  1997年   4篇
  1996年   6篇
  1995年   1篇
  1994年   7篇
  1993年   2篇
  1992年   9篇
  1991年   4篇
  1990年   1篇
  1989年   3篇
  1988年   2篇
  1987年   2篇
  1986年   1篇
  1985年   1篇
  1984年   2篇
  1983年   2篇
  1980年   1篇
  1978年   1篇
  1977年   1篇
  1976年   1篇
  1975年   1篇
排序方式: 共有3273条查询结果,搜索用时 15 毫秒
81.
82.
83.
在医学史课程教学改革中应用问题引导式数学(Problem-Based Learning,PBL),以专题重新组织教材内容,以问题引导教学,开展师生互换型教学和学生参与体验型教学,教考分离,旨在提高课程教学水平,使其从知识性课程提升为知识与思辨相结合的课程,使学生通过医学史课程知史、思史、明史。  相似文献   
84.
Health and access to health care vary strikingly across the globe, and debates about this have been pervasive and controversial. Some comparative data in Canada and South Africa illustrate the complexity of achieving greater equity anywhere, even in a wealthy country like Canada. Potential bi-directional lessons relevant both to local and global public health are identified. Both countries should consider the implications of lost opportunity costs associated with lack of explicit resource allocation policies. While National Health Insurance is attractive politically, Canada's example cannot be fully emulated in South Africa. Short- and medium-term attempts to improve equity in middle-income countries should focus on equitable access to insurance to cover primary health care and on making more use of nurse practitioners and community health workers. In the longer-term, attention is needed to the economic and political power structures that influence health and health care and that ignore the social and societal determinants of sustainable good health locally and globally. This long-term vision of health is needed globally to achieve improvements in individual and population health in a century characterised by limits to economic growth, widening disparities, continuing conflict and migration on a large scale and multiple adverse impacts of climate change.  相似文献   
85.

Objective

To understand market managers' level of communication and use of technology that might influence decision to adopt Electronic Benefits Transfer (EBT) at farmers' markets.

Design

Cross-sectional study using the Theory of Diffusion of Innovation.

Setting

Electronic survey administered in midwest states of Illinois, Michigan, and Wisconsin.

Participants

Farmers' market managers in Illinois, Michigan, and Wisconsin.

Main Outcome Measures

Information on EBT adoption, market managers' communication, and technology use.

Analysis

Binary logistic regression analysis with EBT adoption as the dependent variable and frequency of technology use, partnership with organizations, farmers' market association (FMA) membership, Facebook page and Web site for the market, and primary source of information as independent variables. Chi-square tests and ANOVA were used to compare states and adopter categories.

Results

Logistic regression results showed that the odds of adopting EBT was 7.5 times higher for markets that had partnership with other organizations. Compared with non-adopters, a significantly greater number of early adopters had partnership, FMA membership, and a Facebook page and Web site for market, and reported to a board of directors.

Conclusions and Implications

Markets that had partnership, FMA membership, a Facebook page and Web site, and mandatory reporting to a board of directors were important factors that influenced EBT adoption at midwest farmers' markets.  相似文献   
86.
The indwelling urethral catheter remains an integral part of contemporary medical care, despite its significant design shortcomings. Urethral catheterisation is responsible for well-recognised complications including catheter-associated urinary tract infection (CAUTI), catheter-associated urethral injury (CAUI), catheter blockage, and bladder mucosal irritation. In this narrative review, we provide an update on current innovations in urethral catheter design, aimed at safeguarding against these complications. There is an obvious need to improve catheter technology and urologists should support the translation of innovations into clinical practice.  相似文献   
87.
88.
89.
90.

Objectives

To investigate the factors affecting employees'' knowledge sharing intention, knowledge sharing behavior, and innovation behavior of the four top-ranked university hospitals in South Korea.

Methods

Data were collected from employees at three university hospitals in Seoul, Korea and one university hospital in Gyeonggi-Do, Korea through self-administered questionnaires. The survey was conducted from May 29, 2013 to July 17, 2013. A total of 779 questionnaires were analyzed by SPSS version 18.0 and AMOS version 18.0.

Results

Factors affecting hospital employees'' knowledge sharing intention, knowledge sharing behavior, and innovation behavior are reciprocity, behavioral control, and trust.

Conclusion

It is important to select employees who have a propensity for innovation and continuously educate them about knowledge management based on trust.  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