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   1740101篇
  免费   138555篇
  国内免费   2974篇
耳鼻咽喉   23536篇
儿科学   57350篇
妇产科学   49166篇
基础医学   246016篇
口腔科学   53789篇
临床医学   151223篇
内科学   344942篇
皮肤病学   37623篇
神经病学   141590篇
特种医学   68919篇
外国民族医学   498篇
外科学   260667篇
综合类   40865篇
现状与发展   4篇
一般理论   598篇
预防医学   137871篇
眼科学   39044篇
药学   129488篇
  3篇
中国医学   3514篇
肿瘤学   94924篇
  2018年   18882篇
  2017年   14662篇
  2016年   15736篇
  2015年   18341篇
  2014年   25311篇
  2013年   37169篇
  2012年   51629篇
  2011年   54304篇
  2010年   31185篇
  2009年   29558篇
  2008年   50190篇
  2007年   52967篇
  2006年   53143篇
  2005年   52014篇
  2004年   51017篇
  2003年   48432篇
  2002年   45915篇
  2001年   78911篇
  2000年   81625篇
  1999年   69336篇
  1998年   18893篇
  1997年   17301篇
  1996年   17257篇
  1995年   16808篇
  1994年   15862篇
  1993年   14981篇
  1992年   57196篇
  1991年   55484篇
  1990年   54185篇
  1989年   52458篇
  1988年   48738篇
  1987年   47944篇
  1986年   45569篇
  1985年   44082篇
  1984年   32916篇
  1983年   28307篇
  1982年   16570篇
  1981年   14804篇
  1979年   31154篇
  1978年   21540篇
  1977年   18125篇
  1976年   16993篇
  1975年   18007篇
  1974年   21906篇
  1973年   21107篇
  1972年   19208篇
  1971年   18078篇
  1970年   16664篇
  1969年   15615篇
  1968年   14294篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
ABSTRACT

Objectives: The present study investigated the relationships of enculturation and depressive symptoms with health risk behavior engagement in Mexican-American college students and examined how these relationships differed by gender. Previous research has noted consistent gender differences in health risk behavior (e.g. alcohol use, substance use, and risky sexual behavior) among Latina/os, and emphasized the role of U.S. acculturation in this difference. Research examining the role of heritage cultural retention (i.e. enculturation), and including the added influence of mental health variables, such as depressive symptoms, is currently lacking. This study sought to address this gap.

Design: A large sample (N?=?677) of Mexican-American college students from four universities (located in New York, California, Florida, and Texas) completed an online questionnaire assessing health risk behaviors and corresponding variables.

Results: We found that males who endorsed more behavioral enculturation and depressive symptoms were more likely to engage in health risk behavior than all others in the sample. Contrary to previous literature, no relationship was found between behavioral enculturation and health risk behavior in females.

Conclusion: The current study found behavioral enculturation to be associated with depressive symptoms, and in turn with health risk behaviors among the males in our sample. Additional research will be needed to identify the mechanism underlying the relationship between enculturation and depressive symptoms as well as between depressive symptoms and risky behavior.  相似文献   
112.
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   
113.
114.
115.
116.
117.
118.
119.
120.
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