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   50128篇
  免费   3638篇
  国内免费   464篇
耳鼻咽喉   903篇
儿科学   734篇
妇产科学   832篇
基础医学   7547篇
口腔科学   1346篇
临床医学   4548篇
内科学   10007篇
皮肤病学   1754篇
神经病学   3540篇
特种医学   2983篇
外科学   6352篇
综合类   916篇
现状与发展   4篇
一般理论   23篇
预防医学   2220篇
眼科学   1308篇
药学   4444篇
中国医学   640篇
肿瘤学   4129篇
  2023年   323篇
  2022年   919篇
  2021年   1931篇
  2020年   1061篇
  2019年   1404篇
  2018年   1725篇
  2017年   1303篇
  2016年   1846篇
  2015年   2390篇
  2014年   2699篇
  2013年   3059篇
  2012年   4536篇
  2011年   4291篇
  2010年   2554篇
  2009年   2117篇
  2008年   2903篇
  2007年   2695篇
  2006年   2448篇
  2005年   2270篇
  2004年   1812篇
  2003年   1554篇
  2002年   1280篇
  2001年   941篇
  2000年   904篇
  1999年   723篇
  1998年   283篇
  1997年   241篇
  1996年   165篇
  1995年   162篇
  1994年   160篇
  1993年   132篇
  1992年   268篇
  1991年   299篇
  1990年   251篇
  1989年   229篇
  1988年   206篇
  1987年   212篇
  1986年   185篇
  1985年   158篇
  1984年   118篇
  1983年   108篇
  1979年   113篇
  1978年   69篇
  1977年   65篇
  1975年   90篇
  1974年   68篇
  1972年   76篇
  1971年   83篇
  1970年   69篇
  1969年   67篇
排序方式: 共有10000条查询结果,搜索用时 421 毫秒
1.
2.
3.
4.
5.
Rhabdomyolysis is a syndrome of skeletal muscle injury with release of cellular constituents such as potassium,phosphate,urate and intracellular proteins such as myoglobin into the circulation,which may cause complications including acute kidney injury,electrolyte disturbance and cardiac instability.Abnormal liver function tests are frequently observed in cases of severe rhabdomyolysis.Typically,there is an increase in serum aminotransferases,namely aspartate aminotransferase and alanine aminotransferase.This raises the question of liver injury and often triggers a pathway of investigation which may lead to a liver biopsy.However,muscle can also be a source of the increased aminotransferase activity.This review discusses the dilemma of finding abnormal liver function tests in the setting of muscle injury and the potential implications of such an association.It delves into some of the clinical and experimental evidence for correlating muscle injury to raised aminotransferases,and discusses pathophysiological mechanisms such as oxidative stress which may cause actual liver injury.Serum aminotransferases lack tissue specificity to allow clinicians to distinguish primary liver injury from muscle injury.This review also explores potential approaches to improve the accuracy of our diagnostic tools,so that excessive or unnecessary liver investigations can be avoided.  相似文献   
6.
7.
ABSTRACT

Purpose

Work-related eye injuries have been reported with a variety of epidemiologic and clinical characteristics. We aimed to identify epidemiologic characteristics of work-related eye injuries and risk factors associated with severe injury in a large metropolitan city.  相似文献   
8.
Abstract

Objective

Ras wild-type metastatic colorectal cancers (mCRC) may be treated with anti-vascular endothelial growth factor (VEGF) or anti-epidermal growth factor receptor (EGFR) agents. We aim to estimate patients’ preferences for mCRC treatment and relative importance of cost, efficacy improvement, avoidance of side effects and therapy convenience, and relative uptake between profiles that resemble Bevacizumab (anti-VEGF) and Cetuximab (anti-EGFR), two commonly prescribed mCRC targeted therapies.  相似文献   
9.
Scrub typhus usually presents as acute undifferentiated fever. This cross-sectional study included adult patients presenting with acute undifferentiated fever defined as any febrile illness for ≤ 14 days without evidence of localized infection. Scrub typhus cases were defined by an antibody titer of a ≥ fourfold increase in paired sera, a ≥ 1:160 in a single serum using indirect immunofluorescence assay, or a positive result of the immunochromatographic test. Multiple regression analysis identified predictors associated with scrub typhus to develop a prediction rule. Of 250 cases with known etiology of acute undifferentiated fever, influenza (28.0%), hepatitis A (25.2%), and scrub typhus (16.4%) were major causes. A prediction rule for identifying suspected cases of scrub typhus consisted of age ≥ 65 years (two points), recent fieldwork/outdoor activities (one point), onset of illness during an outbreak period (two points), myalgia (one point), and eschar (two points). The c statistic was 0.977 (95% confidence interval = 0.960–0.994). At a cutoff value ≥ 4, the sensitivity and specificity were 92.7% (79.0–98.1%) and 90.9% (86.0–94.3%), respectively. Scrub typhus, the third leading cause of acute undifferentiated fever in our region, can be identified early using the prediction rule.  相似文献   
10.
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