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   235983篇
  免费   15550篇
  国内免费   988篇
耳鼻咽喉   2532篇
儿科学   6051篇
妇产科学   4433篇
基础医学   29592篇
口腔科学   4353篇
临床医学   24194篇
内科学   49786篇
皮肤病学   3282篇
神经病学   23831篇
特种医学   10170篇
外国民族医学   13篇
外科学   37136篇
综合类   2588篇
现状与发展   1篇
一般理论   177篇
预防医学   16638篇
眼科学   5576篇
药学   15584篇
  1篇
中国医学   319篇
肿瘤学   16264篇
  2023年   1232篇
  2022年   1857篇
  2021年   5340篇
  2020年   3064篇
  2019年   5079篇
  2018年   6078篇
  2017年   4466篇
  2016年   4868篇
  2015年   5762篇
  2014年   8381篇
  2013年   11310篇
  2012年   17364篇
  2011年   18072篇
  2010年   10102篇
  2009年   9345篇
  2008年   15944篇
  2007年   16726篇
  2006年   16257篇
  2005年   16120篇
  2004年   15165篇
  2003年   13843篇
  2002年   13232篇
  2001年   1971篇
  2000年   1496篇
  1999年   2056篇
  1998年   2805篇
  1997年   2224篇
  1996年   1941篇
  1995年   1773篇
  1994年   1544篇
  1993年   1504篇
  1992年   1013篇
  1991年   966篇
  1990年   828篇
  1989年   788篇
  1988年   724篇
  1987年   654篇
  1986年   673篇
  1985年   706篇
  1984年   934篇
  1983年   822篇
  1982年   1055篇
  1981年   983篇
  1980年   853篇
  1979年   488篇
  1978年   539篇
  1977年   469篇
  1976年   434篇
  1975年   335篇
  1974年   329篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.

Background

A history of childhood maltreatment and psychopathology are common in adults with obesity.

Objectives

To report childhood maltreatment and to evaluate associations between severity and type of childhood maltreatment and lifetime history of psychopathology among adults with severe obesity awaiting bariatric surgery.

Setting

Four clinical centers of the Longitudinal Assessment of Bariatric Surgery Research Consortium.

Methods

The Childhood Trauma Questionnaire, which assesses presence/severity (i.e., none, mild, moderate, severe) of physical abuse, mental abuse, physical neglect, mental neglect, and sexual abuse, was completed by 302 female and 66 male bariatric surgery patients. Presurgery lifetime history of psychopathology and suicidal ideation/behavior were assessed with the Structured Clinical Interview for DSM-IV and the Suicidal Behavioral Questionnaire-Revised, respectively. Presurgery lifetime history of antidepressant use was self-reported.

Results

Two thirds (66.6%) of females and 47.0% of males reported at least 1 form of childhood trauma; 42.4% and 24.2%, respectively, at greater than or equal to moderate severity. Among women, presence/greater severity of childhood mental or physical abuse or neglect was associated with a higher risk of history of psychopathology (i.e., major depressive disorder, posttraumatic stress disorder, other anxiety disorder, alcohol use disorder, binge eating disorder), suicidal ideation/behavior and antidepressant use (P for all ≤ .02). These associations were independent of age, race, education, body mass index, and childhood sexual abuse. Childhood sexual abuse was independently associated with a history of suicidal ideation/behavior and antidepressant use only (P for both ≤ .05). Statistical power was limited to evaluate these associations among men.

Conclusion

Among women with obesity, presence/severity of childhood trauma was positively associated with relatively common psychiatric disorders.  相似文献   
54.
55.
56.
HIV risk in vulnerable groups such as itinerant male street labourers is often examined via a focus on individual determinants. This study provides a test of a modified Information-Motivation-Behavioral Skills (IMB) model to predict condom use behaviour among male street workers in urban Vietnam. In a cross-sectional survey using a social mapping technique, 450 male street labourers from 13 districts of Hanoi, Vietnam were recruited and interviewed. Collected data were first examined for completeness; structural equation modelling was then employed to test the model fit. Condoms were used inconsistently by many of these men, and usage varied in relation to a number of factors. A modified IMB model had a better fit than the original IMB model in predicting condom use behaviour. This modified model accounted for 49% of the variance, versus 10% by the original version. In the modified model, the influence of psychosocial factors was moderately high, whilst the influence of HIV prevention information, motivation and perceived behavioural skills was moderately low, explaining in part the limited level of condom use behaviour. This study provides insights into social factors that should be taken into account in public health planning to promote safer sexual behaviour among Asian male street labourers.  相似文献   
57.
58.
59.
We present the case of a 74-year-old Caucasian female who suffered sudden visual loss after routine phacoemulsification cataract surgery. The patient was subsequently diagnosed with non-arteritic anterior ischaemic optic neuropathy. The case is described in detail, and a concise review of the literature is presented together with the authors’ view on the subject outlined. This is a very rare complication after cataract surgery even in high-risk patients with associated systemic co-morbidities. We suspect that the previous history of obesity, coronary artery disease, and arteriosclerosis contributed to the development of this serious ocular complication. We suggest appropriate measures to reduce the risk of its occurrence.  相似文献   
60.
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