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   1685641篇
  免费   136794篇
  国内免费   3034篇
耳鼻咽喉   22704篇
儿科学   54935篇
妇产科学   47407篇
基础医学   238480篇
口腔科学   49323篇
临床医学   149204篇
内科学   333094篇
皮肤病学   35402篇
神经病学   138202篇
特种医学   68198篇
外国民族医学   475篇
外科学   257560篇
综合类   40405篇
现状与发展   3篇
一般理论   725篇
预防医学   128675篇
眼科学   38038篇
药学   126289篇
  3篇
中国医学   3095篇
肿瘤学   93252篇
  2018年   17587篇
  2016年   15073篇
  2015年   17446篇
  2014年   24011篇
  2013年   35745篇
  2012年   48981篇
  2011年   51369篇
  2010年   30062篇
  2009年   28552篇
  2008年   48479篇
  2007年   50499篇
  2006年   51148篇
  2005年   49736篇
  2004年   48607篇
  2003年   46403篇
  2002年   44999篇
  2001年   76278篇
  2000年   78829篇
  1999年   67058篇
  1998年   18548篇
  1997年   16959篇
  1996年   16824篇
  1995年   16526篇
  1994年   15475篇
  1993年   14616篇
  1992年   55739篇
  1991年   54055篇
  1990年   52822篇
  1989年   51093篇
  1988年   47483篇
  1987年   46803篇
  1986年   44538篇
  1985年   43092篇
  1984年   32335篇
  1983年   27840篇
  1982年   16449篇
  1981年   14728篇
  1980年   13789篇
  1979年   30590篇
  1978年   21241篇
  1977年   17933篇
  1976年   16803篇
  1975年   17688篇
  1974年   21611篇
  1973年   20778篇
  1972年   18950篇
  1971年   17874篇
  1970年   16353篇
  1969年   15320篇
  1968年   14008篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
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   
75.
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   
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