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   209288篇
  免费   3949篇
  国内免费   1840篇
耳鼻咽喉   1688篇
儿科学   7101篇
妇产科学   3798篇
基础医学   20447篇
口腔科学   2099篇
临床医学   16393篇
内科学   36645篇
皮肤病学   1464篇
神经病学   18200篇
特种医学   10049篇
外国民族医学   17篇
外科学   32171篇
综合类   6586篇
现状与发展   4篇
一般理论   7篇
预防医学   20302篇
眼科学   3511篇
药学   12942篇
  23篇
中国医学   2287篇
肿瘤学   19343篇
  2024年   90篇
  2023年   489篇
  2022年   1172篇
  2021年   1550篇
  2020年   1137篇
  2019年   1190篇
  2018年   23074篇
  2017年   18345篇
  2016年   20458篇
  2015年   2428篇
  2014年   2664篇
  2013年   2612篇
  2012年   9508篇
  2011年   23629篇
  2010年   20479篇
  2009年   12759篇
  2008年   21267篇
  2007年   23382篇
  2006年   2312篇
  2005年   3898篇
  2004年   4615篇
  2003年   5521篇
  2002年   3504篇
  2001年   1151篇
  2000年   1219篇
  1999年   900篇
  1998年   651篇
  1997年   609篇
  1996年   417篇
  1995年   402篇
  1994年   367篇
  1993年   254篇
  1992年   361篇
  1991年   366篇
  1990年   339篇
  1989年   244篇
  1988年   243篇
  1987年   196篇
  1986年   144篇
  1985年   145篇
  1984年   103篇
  1983年   64篇
  1982年   49篇
  1981年   35篇
  1980年   60篇
  1979年   34篇
  1970年   36篇
  1938年   63篇
  1932年   57篇
  1930年   46篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.

Background and aims

Since accelerated atherosclerosis has been reported in systemic lupus erythematosus (SLE), predictive biomarkers of cardiovascular disease (CVD) are needed. Among non-traditional risk factors, bone mineral density (BMD) has been related to CVD. However, its role in SLE remains controversial. This study aims to analyze the associations of subclinical atherosclerosis with traditional and non-traditional CV risk factors.

Methods and results

In a cross-sectional study, atherosclerosis burden was compared between 112 female SLE patients and 31 controls. Plaque number and carotid intima-media wall thickness (cIMT) were assessed by ultrasonography. In a retrospective study, BMD determinations obtained 5-years before the ultrasonography assessment were analyzed in a subgroup of 62 patients. Plaque frequency was increased in SLE, even in patients without CV events or carotid wall thickening. cIMT was increased in patients with CVD, positively correlated with body mass index (BMI). Interestingly, a paradoxical effect of BMI on carotid parameters was observed. Whereas underweight patients (BMI < 20) showed increased prevalence of carotid plaques with low cIMT, those with BMI > 30 showed higher cIMT and plaque burden. Overweight patients (25 < BMI<30) exhibited both elevated cIMT and plaque number. BMI was an independent predictor of BMD. In our retrospective study, patients with either clinical or subclinical CVD exhibited lower BMD levels than their CV-free counterparts. A low lumbar spine BMD independently predicted CVD development after adjusting for confounders.

Conclusion

SLE was associated with a higher subclinical atherosclerosis burden, a bimodal effect being observed for BMI. Decreased BMD can be a CV risk biomarker in SLE.  相似文献   
2.
3.
4.
5.
Relationship-centered care reflects both knowing and feeling: the knowledge that physician and patient bring from their respective domains of expertise, and the physician’s and patient’s experience, expression, and perception of emotions during the medical encounter. These processes are conveyed and reciprocated in the care process through verbal and nonverbal communication. We suggest that the emotional context of care is especially related to nonverbal communication and that emotion-related communication skills, including sending and receiving nonverbal messages and emotional self-awareness, are critical elements of high-quality care. Although nonverbal behavior has received far less study than other care processes, the current review argues that it holds significance for the therapeutic relationship and influences important outcomes including satisfaction, adherence, and clinical outcomes of care.  相似文献   
6.
7.
8.
Contemporary discourse contains numerous examples of use of the concept of culture by social and behavioral scientists. Simple reification, where the speaker makes culture into a thing capable of action exemplifies one usage in public discourse. Some quantitative social scientists attempt to characterize people’s cultural identities by means of a single categorical variable, which often “lumps” people into categories such as “Hispanic” or “Black” that in fact have numerous culturally bounded subcategories. Approaches that emphasize cultural process are preferable to those who attempt to categorize; more complex measures of acculturation help investigators to make convincing analyses of circumstances in which health disparities occur. Examples in which investigators make appropriate use of cultural characterizations demonstrate their utility in investigating health disparities in Haitian American women, injecting and noninjecting drug users, Hispanic youth, and adult Hispanics at risk of HIV infection. Focus on culture in the study of health disparities can identify entanglements between structural factors such as poverty and lack of education and cultural factors such as beliefs about health. Qualitative methods coupled with quantitative methods have great potential to improve investigators’ grasp of cultural nuance while capturing the distribution of qualitatively derived behaviors.  相似文献   
9.
10.
The specific characteristics of genetic data lead to ethical-legal conflicts in the framework of genetic diagnosis. Several international organisations, including UNESCO and the Council of Europe, have enacted rules referring to the use of genetic information. This paper discusses possible legal and ethical criteria that could be used in genetic testing.  相似文献   
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