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   46692篇
  免费   3360篇
  国内免费   190篇
耳鼻咽喉   375篇
儿科学   1506篇
妇产科学   1200篇
基础医学   6591篇
口腔科学   595篇
临床医学   5031篇
内科学   9732篇
皮肤病学   876篇
神经病学   5541篇
特种医学   1123篇
外科学   4150篇
综合类   380篇
一般理论   58篇
预防医学   5666篇
眼科学   617篇
药学   2974篇
中国医学   86篇
肿瘤学   3741篇
  2024年   59篇
  2023年   652篇
  2022年   1086篇
  2021年   2143篇
  2020年   1297篇
  2019年   1772篇
  2018年   2034篇
  2017年   1361篇
  2016年   1515篇
  2015年   1659篇
  2014年   2024篇
  2013年   2625篇
  2012年   4195篇
  2011年   4151篇
  2010年   2104篇
  2009年   1845篇
  2008年   2945篇
  2007年   2908篇
  2006年   2773篇
  2005年   2569篇
  2004年   2279篇
  2003年   2034篇
  2002年   1731篇
  2001年   192篇
  2000年   142篇
  1999年   209篇
  1998年   347篇
  1997年   260篇
  1996年   212篇
  1995年   175篇
  1994年   123篇
  1993年   117篇
  1992年   68篇
  1991年   65篇
  1990年   55篇
  1989年   56篇
  1988年   50篇
  1987年   37篇
  1986年   38篇
  1985年   34篇
  1984年   46篇
  1983年   44篇
  1982年   33篇
  1981年   41篇
  1980年   28篇
  1979年   17篇
  1978年   13篇
  1977年   20篇
  1975年   9篇
  1973年   8篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
The number of left ventricular assist device (LVAD) implantations is growing as a result of increased waiting periods for cardiac transplantation and the decreased availability of organ donors. Furthermore, the Food and Drug Administration (FDA) has approved permanent LVAD support. After an acute hospitalization, patients with LVADs may need prolonged convalescence in a healthcare facility because they have complex medical needs and are physically disabled. Admission criteria need to be developed as essential patient and nursing competencies need to be defined as a part of a successful LVAD program in an acute rehabilitation center. Acute rehabilitation centers can help patients with LVADs transition to a home setting.  相似文献   
12.
13.
Currently, the best treatment option for idiopathic cervical dystonia (ICD) is injection of botulinum toxin (BTX) into the affected muscles, whereas rehabilitative approaches have given disappointing results. We evaluated whether the association of an ad hoc rehabilitative program may improve the clinical efficacy of BTX treatment in a single-center, cross-over, controlled study. Forty patients with ICD were randomly assigned to two different treatment groups: (1) BTX type A (BTX-A) plus a specific program of physical therapy (BTX-PT) or (2) BTX-A alone (BTX-0). Patients in the BTX-PT group showed a longer duration of the clinical benefit (118.8 vs. 99.1 days) and needed a lower dose of BTX at reinjection (284.5 vs. 325.5 units). In addition, they showed more marked reductions in their disability in activities of daily living (-9.7 vs. -4.85 points) and subjective pain (-13.35 vs. 6.95 points) scores. Association of BTX-A therapy with a specific program of physical therapy may improve ICD treatment outcome.  相似文献   
14.
This study evaluated the effectiveness of early orthodontic treatment with the Twin-block appliance for the developing Class II Division 1 malocclusion. This multicenter trial was carried out in the United Kingdom. A total of 174 children, aged 8 to 10 years old, with Class II Division 1 malocclusion were randomly allocated to receive treatment with a Twin-block appliance or to an untreated, control group. Data were collected at the start of the study and 15 months later. Results showed that early treatment with Twin-block appliances resulted in reduction of overjet, correction of molar relationships, and reduction in severity of malocclusion. Most of this correction was due to dentoalveolar change, but some was due to favorable skeletal change. Early treatment with the Twin-block appliance is effective in reducing overjet and severity of malocclusion. The small change in the skeletal relationship might not be considered clinically significant.  相似文献   
15.
Quebec strain of C. difficile in 7 provinces   总被引:1,自引:0,他引:1       下载免费PDF全文
  相似文献   
16.
17.
The portrayal of alcohol was examined in a systematic sampleof 50 programmes broadcast on British television. Four out offive programmes contained visual or verbal references to alcohol.On average, there was a reference to alcohol in every 6 minutesof programming. The programmes showed more alcohol being consumedthan soft drinks or beverages, but there were few referencesto the hazards of alcohol consumption. The main recommendationis that television companies should accept a responsibilityfor presenting a more realistic and healthier approach to theuse of alcohol in Britain  相似文献   
18.
Reprinted from Sexuality Update, a publication of The National Task Force On Sexuality and Disability of the American Congress of Rehabilitation Medicine, Vol 2, No. 1, 1989.  相似文献   
19.
20.
Back pain among nurses is a common problem. Prior studies of this problem have been based on cross-sectional or retrospective data. This 18-month prospective study involving nurses newly graduated from nursing school investigated personal, worksite, and training factors associated with future risk of back pain. Each nurse underwent a preliminary interview and periodic follow-ups to identify those with back injuries. Contingency tables and logistic regression analyses demonstrated that prior significant back pain episodes (evidenced by previous job changes because of back pain, frequent medication use, etc.) were associated with increased future risk. Training at nursing school or on the job did not have a protective effect. This pilot study therefore suggests factors useful in placement and counseling of new nurses and indicates the need for further implementation of mechanical lift assist device use. © 1994 Wiley-Liss, Inc.  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