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   1681篇
  免费   120篇
  国内免费   4篇
耳鼻咽喉   3篇
儿科学   45篇
妇产科学   27篇
基础医学   262篇
口腔科学   32篇
临床医学   210篇
内科学   267篇
皮肤病学   26篇
神经病学   174篇
特种医学   88篇
外科学   204篇
综合类   10篇
一般理论   4篇
预防医学   238篇
眼科学   24篇
药学   114篇
中国医学   1篇
肿瘤学   76篇
  2023年   25篇
  2022年   24篇
  2021年   101篇
  2020年   61篇
  2019年   78篇
  2018年   77篇
  2017年   52篇
  2016年   52篇
  2015年   64篇
  2014年   68篇
  2013年   76篇
  2012年   144篇
  2011年   151篇
  2010年   68篇
  2009年   53篇
  2008年   103篇
  2007年   74篇
  2006年   81篇
  2005年   72篇
  2004年   47篇
  2003年   43篇
  2002年   26篇
  2001年   12篇
  2000年   7篇
  1999年   13篇
  1998年   5篇
  1997年   5篇
  1994年   7篇
  1993年   8篇
  1992年   14篇
  1991年   14篇
  1990年   18篇
  1989年   12篇
  1988年   11篇
  1987年   23篇
  1986年   22篇
  1985年   7篇
  1984年   10篇
  1983年   9篇
  1982年   3篇
  1979年   7篇
  1978年   6篇
  1977年   5篇
  1974年   9篇
  1973年   4篇
  1972年   7篇
  1970年   5篇
  1968年   5篇
  1967年   3篇
  1966年   3篇
排序方式: 共有1805条查询结果,搜索用时 31 毫秒
1.
ABSTRACT

Sexual minority women (SMW) face both increased risk for unintended pregnancy and barriers to achieving wanted pregnancy, but little research investigates SMW’s pregnancy desires. To fill this gap, we conducted five focus groups and 11 in-depth interviews with 20-30-year-old SMW in three US cities. Findings highlight that the heteronormative pregnancy planning paradigm lacks salience for SMW. While some SMW clearly wish to avoid pregnancy, many others are unsure, and factors influencing this uncertainty include relationship context, anticipating logistical barriers, and discord between queer identity and pregnancy.  相似文献   
2.
3.
4.
5.
6.
7.
Background We investigated whether associations between prevalent diabetes and cancer risk are pertinent to older adults and whether associations differ across subgroups of age, body weight status or levels of physical activity.Methods We harmonised data from seven prospective cohort studies of older individuals in Europe and the United States participating in the CHANCES consortium. Cox proportional hazard regression was used to estimate the associations of prevalent diabetes with cancer risk (all cancers combined, and for colorectum, prostate and breast). We calculated summary risk estimates across cohorts using pooled analysis and random-effects meta-analysis.Results A total of 667,916 individuals were included with an overall median (P25–P75) age at recruitment of 62.3 (57–67) years. During a median follow-up time of 10.5 years, 114,404 total cancer cases were ascertained. Diabetes was not associated with the risk of all cancers combined (hazard ratio (HR) = 0.94; 95% confidence interval (CI): 0.86–1.04; I2 = 63.3%). Diabetes was positively associated with colorectal cancer risk in men (HR = 1.17; 95% CI: 1.08–1.26; I2 = 0%) and a similar HR in women (1.13; 95% CI: 0.82–1.56; I2 = 46%), but with a confidence interval including the null. Diabetes was inversely associated with prostate cancer risk (HR = 0.81; 95% CI: 0.77–0.85; I2 = 0%), but not with postmenopausal breast cancer (HR = 0.96; 95% CI: 0.89–1.03; I2 = 0%). In exploratory subgroup analyses, diabetes was inversely associated with prostate cancer risk only in men with overweight or obesity.Conclusions Prevalent diabetes was positively associated with colorectal cancer risk and inversely associated with prostate cancer risk in older Europeans and Americans.Subject terms: Risk factors, Cancer epidemiology  相似文献   
8.
ABSTRACT

We narrate our personal journey through the political minefield that is postpartum crisis by examining our communicative strategies across friendship, research partnership and as mothers on social media platforms. In a country with the highest postpartum maternal death rate in the industrialized world, we argue sharing narratives is a radical feminist act and one that must continue to draw attention to marginalized bodies. We hope to elevate the study of communication challenges mothers may experience for personal and political reasons.  相似文献   
9.
10.
The National Vaccine Program Office (NVPO) manages <www.vaccines.gov> and is part of the U.S. Department of Health and Human Services (HHS). Vaccines.gov offers reliable information from the federal government on vaccines, immunizations, and vaccine-preventable diseases. The web site works with the Centers for Disease Control and Prevention (CDC), National Institutes of Health (NIH), Food and Drug Administration (FDA) and many other government agencies to ensure all information on the web site is accurate and relevant. The web site encourages readers to share the information on the site with friends, family, and patients to promote health literacy on vaccines.  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