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   1650480篇
  免费   133839篇
  国内免费   2614篇
耳鼻咽喉   22390篇
儿科学   54359篇
妇产科学   47365篇
基础医学   234868篇
口腔科学   49095篇
临床医学   145579篇
内科学   323173篇
皮肤病学   35304篇
神经病学   135247篇
特种医学   66961篇
外国民族医学   474篇
外科学   250482篇
综合类   39879篇
现状与发展   3篇
一般理论   571篇
预防医学   126146篇
眼科学   37513篇
药学   124632篇
  3篇
中国医学   3050篇
肿瘤学   89839篇
  2018年   15884篇
  2016年   14146篇
  2015年   15986篇
  2014年   21759篇
  2013年   33434篇
  2012年   45202篇
  2011年   47815篇
  2010年   27907篇
  2009年   26322篇
  2008年   46024篇
  2007年   48388篇
  2006年   48990篇
  2005年   47535篇
  2004年   46862篇
  2003年   45002篇
  2002年   44019篇
  2001年   77468篇
  2000年   80619篇
  1999年   67601篇
  1998年   18154篇
  1997年   16694篇
  1996年   16593篇
  1995年   16245篇
  1994年   15320篇
  1993年   14454篇
  1992年   55633篇
  1991年   53950篇
  1990年   52720篇
  1989年   51032篇
  1988年   47378篇
  1987年   46715篇
  1986年   44456篇
  1985年   43057篇
  1984年   32278篇
  1983年   27771篇
  1982年   16337篇
  1981年   14613篇
  1980年   13720篇
  1979年   30645篇
  1978年   21204篇
  1977年   17919篇
  1976年   16836篇
  1975年   17703篇
  1974年   21601篇
  1973年   20806篇
  1972年   18925篇
  1971年   17829篇
  1970年   16362篇
  1969年   15338篇
  1968年   14036篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
The special interest group on sensitive skin of the International Forum for the Study of Itch previously defined sensitive skin as a syndrome defined by the occurrence of unpleasant sensations (stinging, burning, pain, pruritus and tingling sensations) in response to stimuli that normally should not provoke such sensations. This additional paper focuses on the pathophysiology and the management of sensitive skin. Sensitive skin is not an immunological disorder but is related to alterations of the skin nervous system. Skin barrier abnormalities are frequently associated, but there is no cause and direct relationship. Further studies are needed to better understand the pathophysiology of sensitive skin – as well as the inducing factors. Avoidance of possible triggering factors and the use of well-tolerated cosmetics, especially those containing inhibitors of unpleasant sensations, might be suggested for patients with sensitive skin. The role of psychosocial factors, such as stress or negative expectations, might be relevant for subgroups of patients. To date, there is no clinical trial supporting the use of topical or systemic drugs in sensitive skin. The published data are not sufficient to reach a consensus on sensitive skin management. In general, patients with sensitive skin require a personalized approach, taking into account various biomedical, neural and psychosocial factors affecting sensitive skin.  相似文献   
112.
113.
114.
115.
116.
117.
118.
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   
119.
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   
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