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   83005篇
  免费   6858篇
  国内免费   1347篇
耳鼻咽喉   531篇
儿科学   1196篇
妇产科学   1588篇
基础医学   3362篇
口腔科学   2119篇
临床医学   20863篇
内科学   6333篇
皮肤病学   404篇
神经病学   4438篇
特种医学   1709篇
外国民族医学   10篇
外科学   13049篇
综合类   10911篇
现状与发展   3篇
一般理论   6篇
预防医学   12352篇
眼科学   550篇
药学   6582篇
  188篇
中国医学   2779篇
肿瘤学   2237篇
  2024年   214篇
  2023年   1845篇
  2022年   2964篇
  2021年   4319篇
  2020年   4762篇
  2019年   3692篇
  2018年   3453篇
  2017年   3457篇
  2016年   3312篇
  2015年   3185篇
  2014年   6836篇
  2013年   7012篇
  2012年   5286篇
  2011年   5524篇
  2010年   4451篇
  2009年   3898篇
  2008年   4128篇
  2007年   3574篇
  2006年   3297篇
  2005年   2620篇
  2004年   2219篇
  2003年   1784篇
  2002年   1368篇
  2001年   1147篇
  2000年   923篇
  1999年   825篇
  1998年   718篇
  1997年   622篇
  1996年   511篇
  1995年   417篇
  1994年   394篇
  1993年   324篇
  1992年   288篇
  1991年   265篇
  1990年   172篇
  1989年   172篇
  1988年   144篇
  1987年   146篇
  1986年   148篇
  1985年   163篇
  1984年   117篇
  1983年   100篇
  1982年   111篇
  1981年   88篇
  1980年   65篇
  1979年   42篇
  1978年   35篇
  1977年   24篇
  1976年   23篇
  1975年   16篇
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
41.
目的 探讨PDCA 循环在消化道肿瘤伴糖尿病患者营养全程管理中的效果观察。方法 运用PDCA循环对80例不同程度营养不良的消化道肿瘤伴糖尿病患者实施营养全程管理,比较干预前后患者的体重、BMI指数、糖化血红蛋白、血红蛋白、总蛋白、白蛋白及球蛋白水平。结果 患者血红蛋白、总蛋白、白蛋白及球蛋白水平均有提高,比较差异均有统计学意义(P<0.05)。结论 PDCA循环管理在消化道肿瘤伴糖尿病患者营养全程管理中有较大的优势, 值得推广。  相似文献   
42.
Phenomenon: The central role of clinical leadership in achieving the vision of quality and productivity could be attained by investing in its development in postgraduate medical education. Approach: A critical review of selected literature is presented. Findings: The author identifies some of the main theoretical constructs related to leadership; the pedagogical underpinning of medical leadership programs; their learning objectives; and the mixture of methods, individual and collective, to achieve them. Insights: How to best develop leadership through medical education remains an open debate. Experiential learning, reflective practice, action learning, and mentoring could provide the foundations of leadership development. Application of the aforementioned should be cautious due to limitations of the concept of leadership as currently promoted and lack of robust evaluation methodologies.  相似文献   
43.
44.
While use of large heads in total hip arthroplasty (THA) continues to grow, concerns have been raised regarding anterior hip pain resulting from impingement of the prosthetic head against soft-tissues like the iliopsoas. To address these concerns, a new anatomically contoured head (ACH) was developed. In this study cadaver tests were utilized to show that iliopsoas impingement/tenting caused by conventional heads is significantly relieved with the more rounded and reduced distal profile of the ACH. Thus, the ACH implant may be able to decrease the risk of soft-tissue impingement with conventional heads, particularly in the smaller hip.  相似文献   
45.
46.
47.
48.
49.
At this study a multi-criteria model was developed to examine the available procedures, techniques and methods of handling infectious waste in the large healthcare unit of University Regional General Hospital of Patras, Western Greece. Particularly, this study examined the: a) current legislation and Directives issued for medical waste management at Greece and among the other EU-members, b) contribution of healthcare wastes (HCW) generation rate on social and economic parameters in selected European countries, c) available procedures, techniques, and methods upon the disposal of infectious wastes at the healthcare studied, and, d) propositions for integrated management of such hazardous wastes. Specifically, the Analytic Hierarchy Process (AHP) methodology was applied under pair wise comparison matrices in two stages: 1) the scale factors and the indicators, and 2) the criteria and their sub–criteria. The assessment of these pair wise matrices included the indicators and the sub–criteria. Subsequently, two pair wise comparison matrices, upon a) the “Fulfillment of environmental objectives” indicator and b) the “Energy consumption” sub criterion, were denoted. The AHP methodology yielded good results; however there is still space of improving the environmental performance. The normalized relative weights obtained for the criteria and sub criteria motivated specific actions that have to be handled. Particularly, the results indicated a very good value in environmental management criteria due the values obtained for the commitment towards the environmental policy standards and the waste management procedures. However, further improvements on staff awareness (such as development programs to enhance sensitivity) and more green purchasing suppliers, should be further addressed.  相似文献   
50.
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