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   2693518篇
  免费   199322篇
  国内免费   7247篇
耳鼻咽喉   35276篇
儿科学   88572篇
妇产科学   73387篇
基础医学   387431篇
口腔科学   76998篇
临床医学   251529篇
内科学   520713篇
皮肤病学   58210篇
神经病学   215497篇
特种医学   99891篇
外国民族医学   592篇
外科学   394481篇
综合类   61587篇
现状与发展   5篇
一般理论   947篇
预防医学   214041篇
眼科学   62690篇
药学   198157篇
  12篇
中国医学   6730篇
肿瘤学   153341篇
  2021年   20969篇
  2019年   22002篇
  2018年   31584篇
  2017年   23897篇
  2016年   26221篇
  2015年   29887篇
  2014年   41458篇
  2013年   62181篇
  2012年   85787篇
  2011年   90735篇
  2010年   53516篇
  2009年   49680篇
  2008年   83729篇
  2007年   88865篇
  2006年   89490篇
  2005年   85829篇
  2004年   82337篇
  2003年   78315篇
  2002年   75871篇
  2001年   131192篇
  2000年   134580篇
  1999年   112118篇
  1998年   30655篇
  1997年   27068篇
  1996年   26997篇
  1995年   25819篇
  1994年   23918篇
  1993年   22214篇
  1992年   86773篇
  1991年   84201篇
  1990年   81134篇
  1989年   77678篇
  1988年   71301篇
  1987年   69675篇
  1986年   66053篇
  1985年   62846篇
  1984年   46702篇
  1983年   39784篇
  1982年   23028篇
  1979年   41806篇
  1978年   29323篇
  1977年   24534篇
  1976年   23320篇
  1975年   24297篇
  1974年   29578篇
  1973年   28692篇
  1972年   26613篇
  1971年   24688篇
  1970年   22957篇
  1969年   21264篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
ContextIt is especially important that patients are well informed when making high-stakes, preference-sensitive decisions like those on the Physician Orders for Life-Sustaining Treatment (POLST) form. However, there is currently no way to easily evaluate whether patients understand key concepts when making these important decisions.ObjectivesTo develop a POLST knowledge survey.MethodsExpert (n = 62) ratings of key POLST facts were used to select items for a POLST knowledge survey. The survey was administered to nursing facility residents (n = 97) and surrogate decision-makers (n = 112). A subset (n = 135) were re-administered the survey after a standardized advance care planning discussion to assess the scale's responsiveness to change.ResultsThe 19-item survey demonstrated adequate reliability (α = 0.72.). Residents' scores (x = 11.4, standard deviation 3.3) were significantly lower than surrogate scores (x = 14.7, standard deviation 2.5) (P < 0.001). Scores for both groups increased significantly after administration of a standardized advance care planning discussion (P < 0.001). Although being a surrogate, age, race, education, cognitive functioning, and health literacy were significantly associated with higher POLST Knowledge Survey scores in univariate analyses, only being a surrogate (P < 0.001) and being white (P = 0.028) remained significantly associated with higher scores in multivariate analyses.ConclusionThe 19-item POLST Knowledge Survey demonstrated adequate reliability and responsiveness to change. Findings suggest the survey could be used to identify knowledge deficits and provide targeted education to ensure adequate understanding of key clinical decisions when completing POLST.  相似文献   
102.
103.
104.
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   
105.
106.
107.
108.
109.
110.
Red cell exchange (RCE) is a common procedure in adults with sickle cell disease (SCD). Implantable dual lumen Vortex (DLV) ports can be used for RCE in patients with poor peripheral venous access. We performed a retrospective cohort study of RCE procedures performed in adults with SCD. The main objective of the study was to compare the inlet speed, duration of procedures and rate of complications performed through DLV ports to those performed through temporary central venous and peripheral catheters. Twenty‐nine adults with SCD underwent a total of 318 RCE procedures. Twenty adults had DLV ports placed and 218 procedures were performed using DLV ports. Mean length of follow‐up after DLV port placement was 397 ± 263 days. Six DLV ports were removed due to infection and 1 for malfunction after a mean of 171 ± 120 days. Compared to temporary central venous and peripheral catheters, DLV port procedures had a greater rate of procedural complications, a longer duration, and a lower inlet speed (all P < 0.01). When accounting for the maximum allowable inlet speed to avoid citrate toxicity, 40% of DLV port procedures were greater than 10% below maximum speed, compared to 7 and 14% of procedures performed through temporary central venous and peripheral catheters (P < 0.0001). In conclusion, DLV ports can be used for RCE in adults with SCD, albeit with more procedural complications and longer duration. The smaller internal diameter and longer catheter of DLV ports compared to temporary central venous catheters likely accounts for the differences noted. J. Clin. Apheresis 30:353–358, 2015. © 2015 Wiley Periodicals, Inc.  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