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   117808篇
  免费   11098篇
  国内免费   9139篇
耳鼻咽喉   986篇
儿科学   1122篇
妇产科学   1170篇
基础医学   13935篇
口腔科学   1959篇
临床医学   15867篇
内科学   17681篇
皮肤病学   1250篇
神经病学   6291篇
特种医学   4382篇
外国民族医学   78篇
外科学   11982篇
综合类   20798篇
现状与发展   40篇
一般理论   6篇
预防医学   7961篇
眼科学   3362篇
药学   12230篇
  95篇
中国医学   7078篇
肿瘤学   9772篇
  2024年   430篇
  2023年   1982篇
  2022年   5002篇
  2021年   6361篇
  2020年   4751篇
  2019年   4013篇
  2018年   4172篇
  2017年   3713篇
  2016年   3568篇
  2015年   5444篇
  2014年   6669篇
  2013年   5903篇
  2012年   8524篇
  2011年   9418篇
  2010年   5957篇
  2009年   4703篇
  2008年   6053篇
  2007年   6013篇
  2006年   5806篇
  2005年   5873篇
  2004年   3821篇
  2003年   3504篇
  2002年   3010篇
  2001年   2674篇
  2000年   2817篇
  1999年   3011篇
  1998年   2046篇
  1997年   2063篇
  1996年   1584篇
  1995年   1496篇
  1994年   1299篇
  1993年   826篇
  1992年   992篇
  1991年   802篇
  1990年   678篇
  1989年   660篇
  1988年   539篇
  1987年   481篇
  1986年   414篇
  1985年   305篇
  1984年   145篇
  1983年   123篇
  1982年   77篇
  1981年   82篇
  1980年   57篇
  1979年   56篇
  1976年   7篇
  1975年   6篇
  1963年   6篇
  1941年   11篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
European Archives of Oto-Rhino-Laryngology - Several polymorphisms in a disintegrin and metalloproteinase 33 (ADAM33) have been implicated in susceptibility to allergic rhinitis (AR), but the...  相似文献   
3.
4.
Patients with mechanic ankle instability experience increased tibiotalar and subtalar joint laxity. However, in vivo joint kinematics in functional ankle instability (FAI) patients and lateral ankle sprain (LAS) copers, especially during dynamic activities, are poorly understood. Ten FAI patients, 10 LAS copers, and 10 healthy controls were included in this study. A dual fluoroscopic imaging system was used to analyze the tibiotalar and subtalar joint kinematics during stair descent. Five key poses of stair descent were analyzed. Kinematic data from six degrees of freedom were calculated utilizing a solid modeling software. The range of motion and joint positions in each degree of freedom were compared among the three groups. The tibiotalar joints of FAI patients and LAS copers were significantly more inverted than those of healthy controls during the foot strike (p = 0.016, = 0.264). The subtalar joints of FAI patients were significantly more anteriorly translated (pose 2, p = 0.003, = 0.352; pose 3, p < 0.001, = 0.454; pose 4, p = 0.004, = 0.334), inverted (pose 4, p = 0.027, = 0.234; pose 5,p = 0.034, = 0.221), and externally rotated (pose 4, p = 0.037, = 0.217; pose 5; p = 0.004, = 0.331) than those of healthy controls during the mid‐stance and the heel off. The FAI patients showed excessive tibiotalar inversion and subtalar joint hypermobility during stair descent. Meanwhile, the LAS copers maintained subtalar joint stability, and only showed excessive tibiotalar inversion in foot strike. These data provide insight into the mechanisms behind the development of FAI after initial LAS. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:1860–1867, 2019  相似文献   
5.
6.
7.
Abstract

Background

Comorbidities are commonly seen in patients with coronavirus disease 2019 (COVID-19), but the clinical implication is not yet well-delineated. We aim to characterize the prevalence and clinical implications of comorbidities in patients with COVID-19.  相似文献   
8.
9.
10.
This study aimed to examine the association between floods and the morbidity of dysentery and to quantify the burden of dysentery due to floods in Nanning, China. A generalized additive mixed model was conducted to assess the relationship between monthly morbidity of dysentery and floods from 2004 to 2010. The years lived with disability (YLDs) of dysentery attributable to floods were then estimated based on the WHO framework of the burden of disease study for calculating the potential impact fraction. The relative risk (RR) of floods on the morbidity of dysentery was 1.44 (95% confidence interval [CI] = 1.18–1.75). The models suggest that a potential 1-day rise in flood duration may lead to 8% (RR = 1.08, 95% CI = 1.04–1.12) increase in the morbidity of dysentery. The average attributable YLD per 1,000 of dysentery caused by floods were 0.013 in males, 0.005 in females, and 0.009 in persons. Our study confirms that floods have significantly increased the risk and the burden of dysentery in the study area. Public health action should be taken to prevent and control the potential risk of dysentery after floods. Vulnerable groups such as males and children should be paid more attention.  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