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   1336021篇
  免费   99904篇
  国内免费   4271篇
耳鼻咽喉   16799篇
儿科学   43591篇
妇产科学   36384篇
基础医学   197985篇
口腔科学   35906篇
临床医学   129597篇
内科学   258148篇
皮肤病学   26376篇
神经病学   111903篇
特种医学   48176篇
外国民族医学   366篇
外科学   184067篇
综合类   28773篇
现状与发展   1篇
一般理论   460篇
预防医学   114448篇
眼科学   28984篇
药学   98871篇
  6篇
中国医学   3166篇
肿瘤学   76189篇
  2021年   10915篇
  2019年   11647篇
  2018年   16328篇
  2017年   12293篇
  2016年   13256篇
  2015年   15205篇
  2014年   20808篇
  2013年   32069篇
  2012年   44255篇
  2011年   46903篇
  2010年   27098篇
  2009年   24929篇
  2008年   42726篇
  2007年   45060篇
  2006年   45180篇
  2005年   43597篇
  2004年   41565篇
  2003年   39508篇
  2002年   38316篇
  2001年   60856篇
  2000年   62522篇
  1999年   52286篇
  1998年   14585篇
  1997年   13276篇
  1996年   13117篇
  1995年   12458篇
  1994年   11628篇
  1993年   10925篇
  1992年   41574篇
  1991年   40766篇
  1990年   39457篇
  1989年   37352篇
  1988年   34597篇
  1987年   33704篇
  1986年   32169篇
  1985年   30654篇
  1984年   23041篇
  1983年   19593篇
  1982年   11754篇
  1979年   20812篇
  1978年   14824篇
  1977年   12065篇
  1976年   11878篇
  1975年   12118篇
  1974年   14806篇
  1973年   14479篇
  1972年   13371篇
  1971年   12427篇
  1970年   11494篇
  1969年   10420篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
Abstract

This study is a single-center, retrospective analysis of postmenopausal women presenting with dyspareunia and vulvar pain, aiming to evaluate relative effectiveness of vestibular CO2 laser therapy as a treatment. Three monthly sessions of laser were performed to each patient and thereafter a three-months follow-up was stablished. A total number of 72 patients undergoing vestibular laser treatment were recruited from patient files in the period between 2016 and 2018. Among these, 39 women also received a concomitant treatment with ospemifene (60?mg/day) during the study period. There was a statistically significant reduction of all the symptoms in both groups up to the three month follow-up. Regarding dryness and dyspareunia, the relief tent to be more prominent in the ospemifene?+?laser group at all follow-ups and remained statistically significant at three-month follow-up. Specifically, vestibular dryness was significantly lower in the ospemifene?+?laser group compared with the laser treatment group (?87% vs???34%, respectively), and the vestibular health score started declining faster in the ospemifene?+?laser group. Although, additional research is needed to understand the mechanism of action, our data shows that a combination regimen of laser and ospemifene may improve clinical effectiveness for long-term treatment of symptoms associated with the under-recognized genitourinary syndrome of menopause.  相似文献   
73.
74.
Inbred mouse strains are the most widely used mammalian model organism in biomedical research owing to ease of genetic manipulation and short lifespan; however, each inbred strain possesses a unique repertoire of deleterious homozygous alleles that can make a specific strain more susceptible to a particular disease. In the current study, we report dystrophic cardiac calcinosis (DCC) in C.B‐17 SCID male mice at 10 weeks of age with no significant change in cardiac function. Acquisition of DCC was characterized by myocardial injury, fibrosis, calcification, and necrosis of the tissue. At 10 weeks of age, 38% of the C.B‐17 SCID mice from two different commercial colonies exhibited significant calcinosis on the ventricular epicardium, predominantly on the right ventricle. The frequency of calcinosis was more than 50% for mice obtained from Taconic's Cambridge City colony and 25% for mice obtained from Taconic's German Town colony. Interestingly, the DCC phenotype did not affect cardiac function at 10 weeks of age. No differences in echocardiography or electrocardiography were observed between the calcinotic and non‐calcinotic mice from either colony. Our findings suggest that C.B‐17 SCID mice exhibit DCC as early as 10 weeks of age with no significant impact on cardiac function. This strain of mice should be cautiously considered for the study of cardiac physiology.  相似文献   
75.
76.
77.
78.
79.
80.
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