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   3958篇
  免费   256篇
  国内免费   21篇
耳鼻咽喉   45篇
儿科学   116篇
妇产科学   69篇
基础医学   533篇
口腔科学   324篇
临床医学   318篇
内科学   989篇
皮肤病学   80篇
神经病学   296篇
特种医学   223篇
外科学   382篇
综合类   15篇
预防医学   352篇
眼科学   46篇
药学   318篇
中国医学   20篇
肿瘤学   109篇
  2023年   49篇
  2022年   45篇
  2021年   183篇
  2020年   101篇
  2019年   128篇
  2018年   161篇
  2017年   110篇
  2016年   120篇
  2015年   143篇
  2014年   174篇
  2013年   205篇
  2012年   278篇
  2011年   316篇
  2010年   171篇
  2009年   127篇
  2008年   218篇
  2007年   203篇
  2006年   166篇
  2005年   179篇
  2004年   107篇
  2003年   112篇
  2002年   109篇
  2001年   81篇
  2000年   61篇
  1999年   54篇
  1998年   47篇
  1997年   62篇
  1996年   62篇
  1995年   46篇
  1994年   33篇
  1993年   31篇
  1992年   21篇
  1991年   33篇
  1990年   20篇
  1989年   34篇
  1988年   37篇
  1987年   28篇
  1986年   34篇
  1985年   18篇
  1984年   12篇
  1983年   10篇
  1982年   8篇
  1981年   16篇
  1980年   7篇
  1979年   14篇
  1978年   8篇
  1977年   9篇
  1976年   7篇
  1975年   13篇
  1974年   5篇
排序方式: 共有4235条查询结果,搜索用时 140 毫秒
61.
62.
63.
64.
65.
Adequate prenatal care provides an opportunity for counseling and reducing the complications associated with pregnancy and delivery. Our objective was to describe the demographic, behavioral, and clinical profile of the pregnant women hospitalized at public maternity hospitals and to identify factors associated with six or more prenatal consultations in Vitória, Brazil. A cross-sectional study of 1,380 women was conducted in public maternity hospitals in Vitória, Brazil. Sixty-seven percent of participants had ≥6 prenatal consultations. Reasons for hospitalization were vaginal delivery (55.7%), cesarean section (32.9%), clinical treatment (7.7%), and abortion/miscarriage (3.7%). Having ≥9 years of schooling (odds ratio, OR = 1.8; 95% confidence interval, CI: 1.1–3.1), being married (OR = 1.9; 95% CI: 1.2–2.9) and delivering at term (OR = 3.6; 95% CI: 1.6–8.2) were significantly independently associated with having ≥6 prenatal consultations. Although higher education, being married, and delivering at term were associated with ≥6 prenatal consultations in this population, the high rate of Cesarean sections demonstrates the need for ongoing educative strategies among health professionals.  相似文献   
66.
IntroductionErectile dysfunction (ED) is associated with neurological damage due to human T-lymphotropic virus 1 (HTLV-1) infection, but hormonal and psychogenic factors also cause ED.AimTo evaluate the association of psychogenic and hormonal factors with ED in men infected with HTLV-1.MethodsIn this cross-sectional study, we compared total testosterone, follicle stimulating hormone, luteinizing hormone, prolactin, anxiety symptoms, depressive symptoms, and neurologic manifestations in HTLV-1-infected men with or without ED. The International Index of Erectile Function was used to determine the degree of ED. Participants were grouped according to Osame’s Motor Disability Scale and the Expanded Disability Status Scale: HTLV-1-associated myelopathy or tropical spastic paraparesis (HAM/TSP), probable HAM/TSP, or HTLV-1 carrier. Chi-square and Fisher’s exact tests were used to compare the groups, and regression analyses were used to show predictors of ED.Main Outcome MeasureSexual hormonal levels, psychogenic factors, and neurologic disabilities were found to be associated with ED.ResultsED was associated with age older than 60 years (P < .001), degree of neurologic involvement (P < .001), depression (P = .009), and anxiety (P = .008). In the multivariate analyses, only age and degree of neurological injury remained as risk factors for ED.Clinical ImplicationsNeurological manifestations are a stronger predictor of ED than hormonal and psychogenic factors in HTLV-1-infected men.Strengths & LimitationsThe statistical power of the study was limited due to the low number of participants, but neurologic manifestations were clearly associated with ED. There was no strong association between hormonal and psychogenic factors and ED.ConclusionHormonal and psychogenic factors did not show a strong association with ED in individuals with HTLV-1, but neurological manifestations were strongly associated with ED in these individuals.de Oliveira CJV, Neto, JAC, Andrade RCP, et al. Hormonal and Psychogenic Risk Factors for Erectile Dysfunction in Men with HTLV–1. J Sex Med 2019; 16:1763–1768.  相似文献   
67.
68.
69.
70.
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