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   483349篇
  免费   43686篇
  国内免费   31136篇
耳鼻咽喉   3936篇
儿科学   6652篇
妇产科学   6815篇
基础医学   52128篇
口腔科学   8513篇
临床医学   66041篇
内科学   67215篇
皮肤病学   5440篇
神经病学   23465篇
特种医学   17357篇
外国民族医学   254篇
外科学   44548篇
综合类   86309篇
现状与发展   100篇
一般理论   48篇
预防医学   35764篇
眼科学   13408篇
药学   52147篇
  533篇
中国医学   30006篇
肿瘤学   37492篇
  2024年   1556篇
  2023年   6750篇
  2022年   17351篇
  2021年   22376篇
  2020年   17492篇
  2019年   14544篇
  2018年   15193篇
  2017年   14610篇
  2016年   13381篇
  2015年   20899篇
  2014年   26244篇
  2013年   24866篇
  2012年   36712篇
  2011年   40863篇
  2010年   27855篇
  2009年   22813篇
  2008年   28116篇
  2007年   27819篇
  2006年   26581篇
  2005年   25019篇
  2004年   16972篇
  2003年   16079篇
  2002年   13255篇
  2001年   11345篇
  2000年   10872篇
  1999年   10726篇
  1998年   6417篇
  1997年   6151篇
  1996年   4842篇
  1995年   4559篇
  1994年   3911篇
  1993年   2475篇
  1992年   3242篇
  1991年   2855篇
  1990年   2404篇
  1989年   2096篇
  1988年   1787篇
  1987年   1596篇
  1986年   1294篇
  1985年   945篇
  1984年   550篇
  1983年   431篇
  1982年   236篇
  1981年   258篇
  1980年   180篇
  1979年   290篇
  1978年   184篇
  1977年   136篇
  1974年   136篇
  1972年   124篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
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   
3.
4.
5.
6.
7.
目的 探讨膀胱肿瘤并前列腺增生症患者同期施行膀胱肿瘤切除术和保留尿道粘膜前列腺切除术的可行性.方法 对同期施行经尿道膀胱肿瘤切除术及保留尿道粘膜前列腺切除术的16例膀胱癌合并前列腺增生症患者的临床资料进行了回顾性分析.结果 该组患者均顺利康复,无明显合并症,术后复诊,随访时间2~4年,3例出现肿瘤复发.结论 同期施行膀胱肿瘤切除术和保留尿道粘膜前列腺切除术,安全、效果肯定,值得基层医院推广应用.  相似文献   
8.
The objective of this study is to assess the efficacy and safety of herbal medicines (HMs), as a monotherapy or adjunct therapy, compared to placebo or conventional approaches in the treatment of idiopathic Parkinson's disease (PD). We conducted a systematic review of randomized controlled trials from both conventional and alternative medicine sources. Outcome measures were overall improvement, quality of life, reduction of levodopa dose, and adverse events. Nine studies were included, each testing a different HM. Six of the trials had limited internal validity due to major flaws in design, including the lack of proper randomization; insufficient blinding; unclear inclusive criteria in terms of diagnostic criteria, baseline staging, and duration of disease; lack of proper sample size calculation; and insufficient data analysis. Imbalances in gender and ethnicity among the patients in the included trials were observed. No major adverse events emerged, and no specific pattern was detected from the trials describing such data. In addition to major methodological defects, heterogeneity in (1) HM tested, (2) control treatment, and (3) outcome measure hindered in-depth data analysis and synthesis. Current evidence is insufficient to evaluate the efficacy and safety of various HMs. Further studies with improved trial design and reporting, with assessment on cost-effectiveness, quality of life, and qualitative data are warranted.  相似文献   
9.
李宗庭 《中医研究》2006,19(10):51-52
慢性萎缩性胃炎是以胃黏膜上皮和腺体萎缩、黏膜变薄为特征的慢性疾病。属中医胃脘痛、胃痞等范畴。其病因病机较为复杂,多与饮食不调、情志不畅有关,尤其是饮酒、过食刺激之品,致使脾胃受损,阳气郁遏不振,纳运失司,化源不足,气血阴液亏乏;或中焦运化无力,湿邪滞塞,郁而化热;或  相似文献   
10.
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