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   759166篇
  免费   55283篇
  国内免费   5078篇
耳鼻咽喉   9629篇
儿科学   24316篇
妇产科学   18192篇
基础医学   115585篇
口腔科学   20838篇
临床医学   71278篇
内科学   141066篇
皮肤病学   16761篇
神经病学   51692篇
特种医学   27491篇
外国民族医学   102篇
外科学   108787篇
综合类   26294篇
现状与发展   7篇
一般理论   167篇
预防医学   56062篇
眼科学   17561篇
药学   60907篇
  55篇
中国医学   6440篇
肿瘤学   46297篇
  2021年   8063篇
  2019年   7044篇
  2018年   9582篇
  2017年   7892篇
  2016年   8438篇
  2015年   10152篇
  2014年   13516篇
  2013年   18519篇
  2012年   25259篇
  2011年   26699篇
  2010年   16546篇
  2009年   15067篇
  2008年   23528篇
  2007年   24806篇
  2006年   24948篇
  2005年   23138篇
  2004年   21855篇
  2003年   20592篇
  2002年   19754篇
  2001年   37356篇
  2000年   37793篇
  1999年   31271篇
  1998年   8387篇
  1997年   7206篇
  1996年   7350篇
  1995年   6946篇
  1994年   6353篇
  1992年   23172篇
  1991年   23100篇
  1990年   22455篇
  1989年   22219篇
  1988年   20141篇
  1987年   19546篇
  1986年   18550篇
  1985年   17371篇
  1984年   12748篇
  1983年   10768篇
  1982年   5944篇
  1979年   11532篇
  1978年   8150篇
  1977年   6848篇
  1976年   6604篇
  1975年   7274篇
  1974年   8510篇
  1973年   8149篇
  1972年   7659篇
  1971年   7132篇
  1970年   6879篇
  1969年   6310篇
  1968年   5782篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
31.
32.
Since the new round of health care reform in 2009, the vertical integration of hospitals and primary health institutions has become widely implemented in China as an efficient method for improving quality of primary care. This study aimed to answer the following questions: (a) What is the perceived quality of township health centres (THCs) under integration? (B) What differences could be observed among the three typical integration models, namely, private hospital-THC integration, public hospital-THC integration, and loose collaboration? Two rounds of cross-sectional surveys were conducted from November 2016 to June 2018. The Chinese version of the Primary Care Assessment Tool was used to evaluate perceived quality of sample THCs, and 1118 adult patients were interviewed in total. Multiple linear regressions were employed to compare the quality scores between two survey rounds and among different integration models after controlling for potential confounders. The results revealed that the quality of care significantly improved under private hospital-THC integration as observed by comparing two survey rounds, while no change or slight changes were observed in the other two models. The difference observed among the three models was that the perceived quality of THCs integrated with private hospitals was worse than that of THCs integrated with public hospitals and THCs under loose collaboration, while no significant difference was observed between public hospital-THC integration and loose collaboration. Increased attention should be given to highlighting the tight integration between hospitals and THCs and the different roles played by private and public hospitals in the current reform.  相似文献   
33.
34.
Pharmaceutical Chemistry Journal - Three extracts were produced from the above-ground part of the meadowsweet Filipendula ulmaria (L.) Maxim. using water, 40% ethanol, and 70% ethanol. Comparative...  相似文献   
35.
Abstract

Objective

The sex, age, medical history, treatment, tobacco use, race risk (SAMe-TT2R2) Score; the sex, age, medical history, treatment, tobacco use, genotype combination (SAMe-TT2G2) Score; and the so-called modified SAMe-TT2R2 scores have been proposed to predict the anticoagulation quality for patients with non-valvular atrial fibrillation (NVAF). The data from a prospective controlled study is used to validate the SAMe-TT2R2 and SAMe-TT2G2 scores in Chinese NVAF patients treated with warfarin and to evaluate the association of factors with time in therapeutic range (TTR) to predict the quality of oral anticoagulation control.  相似文献   
36.
37.
Nevo  N.  Goldstein  A. L.  Staierman  M.  Eran  N.  Carmeli  I.  Rayman  S.  mnouskin  Y. 《Hernia》2022,26(6):1491-1499
Hernia - The minimally invasive surgical repair of combined inguinal and ventral hernias often requires shifting from one approach or plane to another. The traditional enhanced-view totally...  相似文献   
38.
目的探讨维生素D(VitD)联合鱼油对糖尿病前期(PDM)患者糖脂代谢、胰岛β细胞功能的影响。 方法选取PDM患者132例,随机均分为联合组(VitD+鱼油)、VitD组(VitD)和对照组(不干预)。比较各组糖脂代谢、胰岛β细胞功能、炎症反应、血管内皮功能等指标。 结果与干预前比较,干预后联合组甘油三酯降低,白细胞介素-10增高(P<0.05),联合组和VitD组低密度脂蛋白胆固醇、肿瘤坏死因子-α、胰岛素抵抗指数、前列腺素E2、瘦素、抵抗素降低(P<0.05),空腹胰岛素、胰岛β细胞功能指数、脂联素增高(P<0.05),且联合组改善更为明显(P<0.05)。 结论维生素D联合鱼油治疗PDM患者可改善其脂代谢和胰岛功能相关指标,具有一定临床应用价值。  相似文献   
39.
Haemophilia is a common cause of genetically inherited bleeding disorders. Pseudotumours occur in 1–2 % of persons with severe forms of haemophilia. These are a result of repeated haemorrhage into soft tissues, subperiosteum or a site of bone fracture with inadequate resorption of the extravasated blood. There are a number of therapeutic alternatives for this dangerous condition: surgical removal, percutaneous management, irradiation, embolization etc. In this case report, we describe the natural history, clinical course and successful surgical management of a patient with haemophilia who presented with a massive pseudotumour. We also briefly review the relevant literature on the various therapeutic modalities that have been implemented in the management of this rare complication. Though surgeons may be averse to operate on haemophiliacs, primary surgical management as done in our case may prove to be the definitive treatment option for such patients.  相似文献   
40.
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