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   88711篇
  免费   9250篇
  国内免费   272篇
耳鼻咽喉   1488篇
儿科学   2105篇
妇产科学   2080篇
基础医学   9302篇
口腔科学   5214篇
临床医学   9326篇
内科学   21899篇
皮肤病学   2124篇
神经病学   7716篇
特种医学   2519篇
外科学   12882篇
综合类   346篇
现状与发展   12篇
一般理论   26篇
预防医学   8502篇
眼科学   1580篇
药学   4636篇
中国医学   256篇
肿瘤学   6220篇
  2024年   208篇
  2023年   1531篇
  2022年   558篇
  2021年   1737篇
  2020年   1858篇
  2019年   1653篇
  2018年   3379篇
  2017年   2510篇
  2016年   2806篇
  2015年   3570篇
  2014年   4008篇
  2013年   5344篇
  2012年   6641篇
  2011年   6466篇
  2010年   3965篇
  2009年   3878篇
  2008年   5631篇
  2007年   5546篇
  2006年   5887篇
  2005年   5405篇
  2004年   4778篇
  2003年   4297篇
  2002年   4136篇
  2001年   1957篇
  2000年   2362篇
  1999年   1396篇
  1998年   715篇
  1997年   633篇
  1996年   694篇
  1995年   535篇
  1994年   410篇
  1993年   368篇
  1992年   307篇
  1991年   282篇
  1990年   234篇
  1989年   228篇
  1988年   183篇
  1987年   183篇
  1986年   175篇
  1985年   175篇
  1984年   177篇
  1983年   155篇
  1982年   164篇
  1981年   136篇
  1980年   119篇
  1979年   78篇
  1978年   74篇
  1977年   82篇
  1976年   67篇
  1974年   59篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
OBJECTIVE: To evaluate the user experience and acceptability of an electronic patient monitoring system. SETTING AND PARTICIPANTS: 822 Military and civilian personnel at a health clinic at a major US military headquarters used an Internet and telephone-based electronic monitoring system to report vaccination-site responses and symptoms after receiving the smallpox vaccination. Focus groups of vaccinees were conducted to help develop a survey about the experience that was distributed to 379 vaccinees (96% completion rate). RESULTS: Users of the electronic monitoring system reported that it was fast and easy to use and reported they would use a system like this again and recommend an electronic monitoring system to a friend or relative. Most users (84%) were comfortable with a physician tracking their vaccine reaction using their electronic reports, but only half (51%) were comfortable with eliminating the post-vaccination follow-up visit with their health-care provider based on their electronic reports. CONCLUSIONS: This electronic monitoring system was well received by vaccinees and allowed health-care providers to track the status of vaccinees. However, vaccinees were not comfortable replacing a physician visit with electronic monitoring, at least for the smallpox vaccination. A monitoring system like this may be useful in public health settings, such as mass vaccination or prophylaxis during a bioterrorism event, a pandemic influenza outbreak, or another public health emergency.  相似文献   
92.
93.
94.
95.
Part III of this series of articles, like Part II, reviews the pioneering efforts in the 19th century to improve the quality of artificial teeth. The focus of this article, unlike that of Part II, is specifically modifications in the design of the occlusal anatomy of the 19th century denture teeth, along with the theories of mandibular movement that inspired those modifications. This article concludes the introductory phase of this project, which seeks to unravel the confusing history of the development of (posterior) denture teeth.  相似文献   
96.
97.
98.
Phonetics, esthetics, function, and comfort form the foundation of a successful dental prosthesis. A review of the mechanics of speech as well as common speech problems encountered with a removable maxillary prosthesis are presented. The use of a palatogram to aid the clinician in the assessment and resolution of speech problems associated with a maxillary denture is demonstrated.  相似文献   
99.
100.
Percutaneous embolization of large portosystemic collaterals was performed in three patients following placement of a transjugular intrahepatic portosystemic shunt in order to improve hepatopetal portal flow. Improved hepatic portal perfusion was achieved in these cases, thereby theoretically reducing the risk of chronic hepatic encephalopathy.  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