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   1610202篇
  免费   131855篇
  国内免费   2610篇
耳鼻咽喉   21715篇
儿科学   53215篇
妇产科学   46396篇
基础医学   228873篇
口腔科学   47454篇
临床医学   141567篇
内科学   316546篇
皮肤病学   34353篇
神经病学   130908篇
特种医学   64910篇
外国民族医学   474篇
外科学   245018篇
综合类   39766篇
现状与发展   3篇
一般理论   548篇
预防医学   123516篇
眼科学   36629篇
药学   121880篇
  3篇
中国医学   3002篇
肿瘤学   87891篇
  2018年   15033篇
  2016年   13112篇
  2015年   15265篇
  2014年   20979篇
  2013年   31732篇
  2012年   43100篇
  2011年   45327篇
  2010年   26697篇
  2009年   25609篇
  2008年   43496篇
  2007年   45734篇
  2006年   46530篇
  2005年   45109篇
  2004年   44444篇
  2003年   42551篇
  2002年   41584篇
  2001年   75828篇
  2000年   78471篇
  1999年   66527篇
  1998年   17802篇
  1997年   16413篇
  1996年   16383篇
  1995年   16071篇
  1994年   15132篇
  1993年   14263篇
  1992年   55543篇
  1991年   53857篇
  1990年   52654篇
  1989年   50925篇
  1988年   47292篇
  1987年   46638篇
  1986年   44346篇
  1985年   42905篇
  1984年   32068篇
  1983年   27605篇
  1982年   16165篇
  1981年   14458篇
  1980年   13583篇
  1979年   30483篇
  1978年   21087篇
  1977年   17777篇
  1976年   16714篇
  1975年   17582篇
  1974年   21495篇
  1973年   20687篇
  1972年   18864篇
  1971年   17778篇
  1970年   16297篇
  1969年   15273篇
  1968年   13952篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
75.
76.
77.
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   
78.
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   
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