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   1345558篇
  免费   103132篇
  国内免费   4263篇
耳鼻咽喉   16916篇
儿科学   44070篇
妇产科学   36689篇
基础医学   199844篇
口腔科学   36265篇
临床医学   130646篇
内科学   260522篇
皮肤病学   26825篇
神经病学   113016篇
特种医学   48554篇
外国民族医学   367篇
外科学   185600篇
综合类   28918篇
现状与发展   1篇
一般理论   476篇
预防医学   115343篇
眼科学   29307篇
药学   99495篇
  6篇
中国医学   3165篇
肿瘤学   76928篇
  2021年   11047篇
  2019年   11779篇
  2018年   16481篇
  2017年   12410篇
  2016年   13417篇
  2015年   15356篇
  2014年   21050篇
  2013年   32421篇
  2012年   44786篇
  2011年   47457篇
  2010年   27390篇
  2009年   25235篇
  2008年   43282篇
  2007年   45635篇
  2006年   45757篇
  2005年   44169篇
  2004年   42066篇
  2003年   39994篇
  2002年   38796篇
  2001年   61229篇
  2000年   62971篇
  1999年   52663篇
  1998年   14756篇
  1997年   13420篇
  1996年   13246篇
  1995年   12602篇
  1994年   11745篇
  1993年   11044篇
  1992年   41894篇
  1991年   41093篇
  1990年   39747篇
  1989年   37648篇
  1988年   34868篇
  1987年   34004篇
  1986年   32434篇
  1985年   30922篇
  1984年   23280篇
  1983年   19768篇
  1982年   11883篇
  1979年   20990篇
  1978年   14983篇
  1977年   12193篇
  1976年   12018篇
  1975年   12242篇
  1974年   14963篇
  1973年   14636篇
  1972年   13496篇
  1971年   12541篇
  1970年   11586篇
  1969年   10504篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
62.
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   
63.
64.
65.
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   
66.
67.
68.
69.
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   
70.
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