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   3209496篇
  免费   232423篇
  国内免费   7126篇
耳鼻咽喉   43839篇
儿科学   104400篇
妇产科学   86941篇
基础医学   469986篇
口腔科学   89519篇
临床医学   299382篇
内科学   613876篇
皮肤病学   68632篇
神经病学   258209篇
特种医学   118310篇
外国民族医学   810篇
外科学   470455篇
综合类   69730篇
现状与发展   13篇
一般理论   1224篇
预防医学   261607篇
眼科学   74146篇
药学   238266篇
  16篇
中国医学   6826篇
肿瘤学   172858篇
  2021年   25808篇
  2019年   26714篇
  2018年   37047篇
  2017年   27943篇
  2016年   30925篇
  2015年   35084篇
  2014年   49134篇
  2013年   74981篇
  2012年   102831篇
  2011年   109566篇
  2010年   64802篇
  2009年   60575篇
  2008年   101964篇
  2007年   108425篇
  2006年   109279篇
  2005年   105804篇
  2004年   101031篇
  2003年   96916篇
  2002年   93718篇
  2001年   142444篇
  2000年   146408篇
  1999年   123260篇
  1998年   36555篇
  1997年   32165篇
  1996年   32172篇
  1995年   30427篇
  1994年   28254篇
  1993年   26577篇
  1992年   96765篇
  1991年   94945篇
  1990年   92383篇
  1989年   88564篇
  1988年   81724篇
  1987年   80160篇
  1986年   75695篇
  1985年   72545篇
  1984年   54231篇
  1983年   46346篇
  1982年   27758篇
  1979年   49986篇
  1978年   35722篇
  1977年   29573篇
  1976年   28578篇
  1975年   30257篇
  1974年   36536篇
  1973年   35211篇
  1972年   32855篇
  1971年   30983篇
  1970年   28700篇
  1969年   26909篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
The present study aimed at measuring seropositivities for infection by Ascaris suum and Toxocara canis using the excretory/secretory (E/S) antigens from Ascaris suum (AES) and Toxocara canis (TES) within an indigenous population. In addition, quantification of cytokine expressions in peripheral blood cells was determined. A total of 50 Warao indigenous were included; of which 43 were adults and seven children. In adults, 44.1% were seropositive for both parasites; whereas children had only seropositivity to one or the other helminth. For ascariosis, the percentage of AES seropositivity in adults and children was high; 23.3% and 57.1%, respectively. While that for toxocariosis, the percentage of TES seropositivity in adults and children was low; 9.3% and 14.3%, respectively. The percentage of seronegativity was comparable for AES and TES antigens in adults (27.9%) and children (28.6%). When positive sera were analyzed by Western blotting technique using AES antigens; three bands of 97.2, 193.6 and 200.2 kDas were mostly recognized. When the TES antigens were used, nine major bands were mostly identified; 47.4, 52.2, 84.9, 98.2, 119.1, 131.3, 175.6, 184.4 and 193.6 kDas. Stool examinations showed that Blastocystis hominis, Hymenolepis nana and Entamoeba coli were the most commonly observed intestinal parasites. Quantification of cytokines IFN-γ, IL-2, IL-6, TGF-β, TNF-α, IL-10 and IL-4 expressions showed that there was only a significant increased expression of IL-4 in indigenous with TES seropositivity (p < 0.002). Ascaris and Toxocara seropositivity was prevalent among Warao indigenous.  相似文献   
102.
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   
103.
104.
105.
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   
106.
107.
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   
108.
109.
110.
Graefe's Archive for Clinical and Experimental Ophthalmology - To evaluate the long-term safety and efficacy of intrastromal bevacizumab for treatment of deep corneal neovascularization in...  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