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   3152171篇
  免费   228345篇
  国内免费   8753篇
耳鼻咽喉   43689篇
儿科学   101694篇
妇产科学   88200篇
基础医学   444437篇
口腔科学   88253篇
临床医学   284961篇
内科学   615935篇
皮肤病学   73551篇
神经病学   258005篇
特种医学   122101篇
外国民族医学   884篇
外科学   475036篇
综合类   68950篇
现状与发展   7篇
一般理论   1160篇
预防医学   242876篇
眼科学   71581篇
药学   231346篇
  8篇
中国医学   6389篇
肿瘤学   170206篇
  2018年   33576篇
  2017年   25895篇
  2016年   29938篇
  2015年   33977篇
  2014年   47051篇
  2013年   71074篇
  2012年   94073篇
  2011年   99387篇
  2010年   59762篇
  2009年   57214篇
  2008年   93011篇
  2007年   99244篇
  2006年   100769篇
  2005年   96958篇
  2004年   93724篇
  2003年   90706篇
  2002年   87367篇
  2001年   147258篇
  2000年   150615篇
  1999年   127304篇
  1998年   37111篇
  1997年   33147篇
  1996年   33145篇
  1995年   32012篇
  1994年   29544篇
  1993年   27729篇
  1992年   100617篇
  1991年   97074篇
  1990年   94277篇
  1989年   91136篇
  1988年   83799篇
  1987年   82327篇
  1986年   77395篇
  1985年   74048篇
  1984年   55613篇
  1983年   47361篇
  1982年   28547篇
  1981年   25698篇
  1979年   50701篇
  1978年   36166篇
  1977年   30645篇
  1976年   28368篇
  1975年   30402篇
  1974年   36322篇
  1973年   34628篇
  1972年   32665篇
  1971年   30274篇
  1970年   28166篇
  1969年   27172篇
  1968年   24913篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
A 42‐year‐old man presented with a viral prodrome and tested positive for influenza A. He rapidly deteriorated developing cardiogenic shock, rhabdomyolysis, and acute kidney injury. Patient improved 1 week later with supportive measures including vasopressors, inotropes, and an intraaortic balloon pump. We report this case as it highlights the discordance between echocardiographic ventricular wall thickening as a result of myocardial edema, and electrocardiographic findings at presentation, with a reversal in findings at time of resolution. Additionally, there was some suggestion of a regional pattern to the reduced longitudinal strain.  相似文献   
85.
86.
87.
The value of adding simeprevir (SMV) vs placebo (PBO) to peginterferon and ribavirin (PR) for treatment of chronic hepatitis C virus infection was examined using patient‐reported outcomes (PROs); further, concordance of PROs with virology endpoints and adverse events (AEs) was explored. Patients (= 768 SMV/PR,= 393 PBO/PR) rated fatigue (FSS), depressive symptoms (CES‐D) and functional impairment (WPAI: Hepatitis C Productivity, Daily Activity and Absenteeism) at baseline and throughout treatment in three randomised, double‐blind trials comparing the addition of SMV or PBO during initial 12 weeks of PR. PR was administered for 48 weeks (PBO group) and 24/48 weeks (SMV group) using a response‐guided therapy (RGT) approach. Mean PRO scores (except Absenteeism) worsened from baseline to Week 4 to the same extent in both groups but reverted after Week 24 for SMV/PR and only after Week 48 for PBO/PR. Accordingly, there was a significantly lower area under the curve (baseline–Week 60, AUC60) and fewer weeks with clinically important worsening of scores in the SMV/PR group at any time point. Incidences of patients with fatigue and anaemia AEs were similar in both groups, but FSS scores showed that clinically important increases in fatigue lasted a mean of 6.9 weeks longer with PBO/PR (P < 0.001). PRO score subgroup analysis indicated better outcomes for patients who met the criteria for RGT or achieved sustained virological response 12 weeks post‐treatment (SVR12); differences in mean PRO scores associated with fibrosis level were only observed with PBO/PR. Greater efficacy of SMV/PR enabled reduced treatment duration and reduced time with PR‐related AEs without adding to AE severity.  相似文献   
88.
89.
Platelet transfusions are a life-saving medical intervention used for the treatment of thrombocytopenia or hemorrhage. Extensive research has gone into trying to understand how to store platelets prior to the transfusion event. Much has been learned about storage bag materials, synthetic solutions, and how temperature impacts platelet viability and function. While room temperature storage of platelets preserves 24-hour in vivo platelet recovery and survival there is a greater risk for bacterial growth. Therefore, cold storage of platelets has become attractive due to the reduction in potential bacterial proliferation and the maintenance of platelet function beyond 5 days of storage. Cold stored platelets, however, have their own set of challenges. Cold stored platelets become activated through several mechanisms. The morphological and molecular changes that occur due to cold exposure enhance their ability to participate in the hemostatic process at the cost of rapid clearance from circulation. This review focuses on the underlying mechanisms leading to cold platelet activation and the receptor modifications involved in platelet clearance.  相似文献   
90.
European Journal of Orthopaedic Surgery & Traumatology - The goals of this study were to compare patient satisfaction and wound-related complications in patients receiving 2-octyl cyanoacrylate...  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