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   49727篇
  免费   3547篇
  国内免费   1258篇
耳鼻咽喉   660篇
儿科学   594篇
妇产科学   606篇
基础医学   7768篇
口腔科学   712篇
临床医学   4866篇
内科学   8904篇
皮肤病学   1380篇
神经病学   3613篇
特种医学   2929篇
外国民族医学   5篇
外科学   6063篇
综合类   2612篇
现状与发展   7篇
一般理论   21篇
预防医学   2258篇
眼科学   1272篇
药学   4907篇
  15篇
中国医学   1278篇
肿瘤学   4062篇
  2024年   52篇
  2023年   424篇
  2022年   1436篇
  2021年   2045篇
  2020年   1151篇
  2019年   1398篇
  2018年   1610篇
  2017年   1307篇
  2016年   1802篇
  2015年   2466篇
  2014年   2883篇
  2013年   3136篇
  2012年   4542篇
  2011年   4535篇
  2010年   2735篇
  2009年   2202篇
  2008年   3013篇
  2007年   2897篇
  2006年   2553篇
  2005年   2412篇
  2004年   1899篇
  2003年   1621篇
  2002年   1387篇
  2001年   803篇
  2000年   821篇
  1999年   643篇
  1998年   329篇
  1997年   284篇
  1996年   213篇
  1995年   198篇
  1994年   169篇
  1993年   135篇
  1992年   188篇
  1991年   204篇
  1990年   156篇
  1989年   117篇
  1988年   104篇
  1987年   89篇
  1986年   91篇
  1985年   57篇
  1984年   40篇
  1983年   55篇
  1982年   47篇
  1981年   33篇
  1980年   31篇
  1979年   36篇
  1978年   22篇
  1974年   20篇
  1972年   19篇
  1971年   19篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
33.
34.
35.
36.
37.
38.
The aim of the study was to explore the relationship between college graduates’ dual self-consciousness, job search clarity and perceived stress, and reveal the mediating role of perceived stress between dual self-consciousness and job search clarity. In this study, 467 college graduates were investigated using the Dual Self-Consciousness Scale, Job Search Clarity Scale, and Perceived Stress Scale. After controlling for gender, age, and region, the results revealed that: (1) private self-consciousness has a significant positive predictive effect on job search clarity; (2) perceived stress has a significant negative predictive effect on job search clarity; (3) perceived stress plays partial mediation effects between private self-consciousness and job search clarity; (4) perceived stress plays complete mediation effects between public self-consciousness and job search clarity; (5) perceived stress has suppressing effects between public self-consciousness and job search clarity.  相似文献   
39.
40.
Background. It has been reported that gender differences in cardiovascular outcomes found in adults also are present in children who undergo surgical repair for congenital heart disease. Methods. California statewide hospital discharge data 1989–99 were used to study outcomes in children <18 years undergoing cardiac surgery. Hospital discharge data were linked to death registry data to study postdischarge death within 30 days of discharge. We used logistic regression to evaluate the effect of gender on mortality controlling for age, race and ethnicity, type of insurance, household income, date and month of surgery, type of admission, hospital case volume, and various types of procedures. Results. There were 25 402 cardiac surgery cases with 1505 in‐hospital deaths (mortality rate of 5.92%). An additional 37 deaths occurred within 30 days after hospital discharge. Crude mortality rates for males (5.99%) and females (5.84%) were not significantly different. However, fewer neonates were female and females underwent a higher proportion of low‐risk procedures than males. Logistic regression revealed that females, compared with males, had a significantly higher odds ratio (OR) for in‐hospital mortality (OR = 1.18, P < .01) and overall (up to 30 days post discharge) mortality (OR = 1.18, P < .01). The risk‐adjusted length of hospital stay was similar between females and males while charges per hospital day were slightly higher in females than males. The prevalence of Down syndrome, pulmonary hypertension, and failure to thrive were higher in females. Conclusions. Female gender is associated with an 18% higher in‐hospital and 30‐day postdischarge mortality as compared with male gender. There was no difference in length of hospital stay between males and females. The mechanism by which female gender acts as a risk factor requires further investigation.  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