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   9776篇
  免费   765篇
  国内免费   33篇
耳鼻咽喉   51篇
儿科学   203篇
妇产科学   126篇
基础医学   1426篇
口腔科学   65篇
临床医学   1084篇
内科学   2617篇
皮肤病学   146篇
神经病学   790篇
特种医学   419篇
外科学   1462篇
综合类   21篇
一般理论   1篇
预防医学   539篇
眼科学   190篇
药学   714篇
中国医学   20篇
肿瘤学   700篇
  2024年   5篇
  2023年   57篇
  2022年   106篇
  2021年   287篇
  2020年   149篇
  2019年   276篇
  2018年   307篇
  2017年   217篇
  2016年   238篇
  2015年   294篇
  2014年   406篇
  2013年   511篇
  2012年   896篇
  2011年   901篇
  2010年   474篇
  2009年   404篇
  2008年   694篇
  2007年   669篇
  2006年   697篇
  2005年   640篇
  2004年   603篇
  2003年   561篇
  2002年   489篇
  2001年   68篇
  2000年   53篇
  1999年   72篇
  1998年   96篇
  1997年   63篇
  1996年   44篇
  1995年   34篇
  1994年   39篇
  1993年   30篇
  1992年   27篇
  1991年   15篇
  1990年   18篇
  1989年   14篇
  1988年   15篇
  1987年   10篇
  1986年   10篇
  1985年   13篇
  1984年   8篇
  1983年   9篇
  1982年   6篇
  1981年   8篇
  1980年   6篇
  1979年   4篇
  1978年   5篇
  1974年   4篇
  1971年   5篇
  1969年   3篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
75.
76.
77.

Purpose

Results from a 6-month double-masked and a 6-month open-label study (SANSIKA) established the efficacy and safety of once-daily 0.1% cyclosporin A cationic emulsion (CsA CE) in severe keratitis due to dry eye disease (DED). This article presents results from the Post-SANSIKA study, a 24-month extension of SANSIKA assessing the sustained efficacy of CsA CE after treatment discontinuation.

Methods

Time to relapse (corneal fluorescein staining [CFS] score ≥4 [modified Oxford scale]) was assessed after treatment discontinuation in patients from the SANSIKA study who had CFS improvement from a score of 4 to ≤2 after 6 or 12 months of treatment with CsA CE.

Findings

Of 62 patients who achieved a CFS score ≤2 at the end of the SANSIKA study, 38 did not relapse and 24 (39%) relapsed during the 24-month period after CsA CE discontinuation; the latter (relapse) group comprised 35% of patients initially treated with CsA CE for 12 months in SANSIKA versus 47% of those treated for 6 months only. Patients spent the most time during the extension study at CFS scores of 1 or 2 (median duration of 8.5 weeks and 14.7 weeks per year, respectively), indicating marked improvement, and less time at scores of 3, 4, or 5 (median time, 2.0 weeks, 0 weeks, and 0 weeks per year). Of 23 patients eligible for safety analysis (ie, patients who received the study treatment at least once), 12 (52.2%) reported a total of 26 ocular adverse events (AEs). Among these, 5 ocular AEs, reported in 5 patients (21.7%), were considered related to study treatment: 3 events of mild instillation site pain in 3 patients (13.0%) and eye discharge and foreign body sensation, each reported in 1 patient (4.3%). Only 1 systemic AE (nasal congestion), reported in 1 patient (4.3%), was considered related to study treatment. None of the AEs led to treatment discontinuation.

Implications

The majority of patients who discontinued CsA CE after experiencing DED improvement in the SANSIKA study did not experience a relapse in this 24-month follow-up study; these patients spent the most time at CFS scores consistent with marked improvement. CsA CE had a favorable safety/tolerability profile over 2 years. Treatment for up to 12 months with CsA CE provides sustained improvements in patients with severe keratitis due to DED. EudraCT registration no. 2012-002066-12.  相似文献   
78.
Sulfur Mustard (SM) is a blistering agent used as a chemical weapon. Glutathione (GSH) is involved in the β-lyase degradation pathway of SM and recently, bioadducts between SM and GSH were observed in vitro. While these bioadducts have never been isolated from in vivo tests or real poisoning with SM, they could be of interest as potential future biomarkers for the retrospective validation of exposure. We herein report the synthesis of different observed and new potential GSH–SM bioadducts as reference materials for analytical investigation. Two distinct approaches were investigated: a building-block pathway and the direct reaction with GSH. The availability of these references will aid future studies and may lead to the discovery of new GSH–SM biomarkers.

Recently, several adducts between the chemical agent sulfur mustard (SM) and glutathione (GSH) were observed in vitro. We report the synthesis of different observed and potential GSH–SM bioadducts as reference materials for analytical investigation.  相似文献   
79.
The technical consultation in Montreux, organised by World Health Organization and UNAIDS in 2007, recommended male circumcision as a method for preventing HIV transmission. This consultation came out of a long process of releasing reports and holding international and regional conferences, a process steered by an informal network. This network's relations with other parties is analysed along with its way of working and the exchanges during the technical consultation that led up to the formal adoption of a recommendation. Conducted in relation to the concepts of a ‘hybrid forum’ and ‘network’, this article shows that the decision was based on the formation and consolidation of a network of persons. They were active in all phases of this process, ranging from studies of the recommendation's efficacy, feasibility and acceptability to its adoption and implementation. In this sense, this consultation cannot be described as the constitution of a ‘hybrid forum’, which is characterised by its openness to a debate as well as a plurality of issues formulated by the actors and of resources used by them. On the contrary, little room was allowed for contradictory discussions, as if the decision had already been made before the Montreux consultation.  相似文献   
80.
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