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   56030篇
  免费   3528篇
  国内免费   113篇
耳鼻咽喉   541篇
儿科学   2307篇
妇产科学   1532篇
基础医学   7026篇
口腔科学   551篇
临床医学   8581篇
内科学   9625篇
皮肤病学   767篇
神经病学   5344篇
特种医学   983篇
外科学   4713篇
综合类   597篇
一般理论   109篇
预防医学   7803篇
眼科学   762篇
药学   3662篇
中国医学   62篇
肿瘤学   4706篇
  2023年   290篇
  2022年   434篇
  2021年   1024篇
  2020年   697篇
  2019年   1053篇
  2018年   1208篇
  2017年   981篇
  2016年   1062篇
  2015年   1241篇
  2014年   1718篇
  2013年   2734篇
  2012年   3944篇
  2011年   4256篇
  2010年   2366篇
  2009年   2138篇
  2008年   3849篇
  2007年   4102篇
  2006年   3951篇
  2005年   4091篇
  2004年   3874篇
  2003年   3658篇
  2002年   3390篇
  2001年   496篇
  2000年   355篇
  1999年   480篇
  1998年   694篇
  1997年   610篇
  1996年   486篇
  1995年   485篇
  1994年   428篇
  1993年   346篇
  1992年   254篇
  1991年   225篇
  1990年   203篇
  1989年   210篇
  1988年   198篇
  1987年   190篇
  1986年   167篇
  1985年   176篇
  1984年   191篇
  1983年   174篇
  1982年   217篇
  1981年   208篇
  1980年   156篇
  1979年   99篇
  1978年   114篇
  1977年   54篇
  1976年   60篇
  1975年   46篇
  1974年   69篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
22.
23.
Pressure ulcers are a high-risk, high-volume, and high-cost problem for persons with disabilities. This article describes four tools published in the literature and reports the validity, reliability, strengths, and limitations of each. These tools include the Pressure Ulcer Scale for Healing (PUSH), the Pressure Sore Status Tool (PSST), the Sussman Wound Healing Tool (SWHT), and the Sessing Scale. Rehabilitation nurses should use a consistent framework with accurate quantification to assess, document, and monitor changes in pressure ulcers over time. Such a measurement tool must prove valid for the disabled population in which the tool is used. This will enable healthcare providers to communicate more effectively and evaluate the therapeutic plan of care.  相似文献   
24.
Metabolic syndrome is associated with increased risk for cardiovascular and cerebrovascular disease. The World Health Organization and National Cholesterol Education Program Adult Treatment Panel III have identified physiologic abnormalities associated with metabolic syndrome, including impaired glucose metabolism, high blood pressure, elevated cholesterol levels, and abdominal obesity. It is estimated that 47 million Americans have metabolic syndrome. A variety of therapies may help reduce the incidence and risk, including diet, weight loss, physical exercise, glycemic control, and pharmacological treatments. Nursing care is focused on developing an individualized plan of care that includes family members and providing education, psychosocial support, close monitoring, and continued follow-up to ensure adherence and success in achieving patient outcomes.  相似文献   
25.
26.
27.
ObjectiveWe examine remission rate probabilities, recovery rates, and residual symptoms across 36 weeks in the Treatment for Adolescents with Depression Study (TADS).MethodThe TADS, a multisite clinical trial, randomized 439 adolescents with major depressive disorder to 12 weeks of treatment with fluoxetine, cognitive–behavioral therapy, their combination, or pill placebo. The pill placebo group, treated openly after week 12, was not included in the subsequent analyses. Treatment differences in remission rates and probabilities of remission over time are compared. Recovery rates in remitters at weeks 12 (acute phase remitters) and 18 (continuation phase remitters) are summarized. We also examined whether residual symptoms at the end of 12 weeks of acute treatment predicted later remission.ResultsAt week 36, the estimated remission rates for intention-to-treat cases were as follows: combination, 60%; fluoxetine, 55%; cognitive–behavioral therapy, 64%; and overall, 60%. Paired comparisons reveal that, at week 24, all active treatments converge on remission outcomes. The recovery rate at week 36 was 65% for acute phase remitters and 71% for continuation phase remitters, with no significant between-treatment differences in recovery rates. Residual symptoms at the end of acute treatment predicted failure to achieve remission at weeks 18 and 36.ConclusionsMost depressed adolescents in all three treatment modalities achieved remission at the end of 9 months of treatment.  相似文献   
28.
29.
The PFA-100 is a relatively new laboratory instrument, first described in 1995. There have since been numerous studies assessing its utility as a screening tool for platelet dysfunction and/or von Willebrand's disease (VWD). The PFA-100 displays variable sensitivity to different types of platelet disorders, as well as to antiplatelet medication (e.g. aspirin), with similar caveats for monitoring of primary haemostasis-promoting therapies in platelet dysfunction. There is therefore considerable uncertainty regarding its utility within this context, and we have accordingly performed an audit of usage among participants of the Royal College of Pathologists of Australasia Quality Assurance Program. Of 105 laboratories surveyed, 40 responded that they performed platelet function testing, with 26 (65%) further indicating they utilized the PFA-100. We report a wide variety of laboratory usage among these users, including numbers of tests performed [annual median (range) = 270 (15-6000)], sources of requests (clinical sources and localities), testing criteria and follow-up action. Most tests were completed within 4 h of collection, as recommended by the manufacturer, and most tests were performed as a replacement, or as a preliminary screen of platelet function (i.e. classical aggregation). Most abnormal findings, however, were attributed to antiplatelet medication such as aspirin.  相似文献   
30.
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