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   4931931篇
  免费   392953篇
  国内免费   15595篇
耳鼻咽喉   69194篇
儿科学   158289篇
妇产科学   130115篇
基础医学   741215篇
口腔科学   137282篇
临床医学   454334篇
内科学   901883篇
皮肤病学   117108篇
神经病学   413687篇
特种医学   193479篇
外国民族医学   970篇
外科学   740381篇
综合类   139042篇
现状与发展   24篇
一般理论   2810篇
预防医学   413173篇
眼科学   115831篇
药学   351921篇
  26篇
中国医学   12993篇
肿瘤学   246722篇
  2021年   56898篇
  2019年   59333篇
  2018年   76180篇
  2017年   58424篇
  2016年   64798篇
  2015年   77262篇
  2014年   111725篇
  2013年   177408篇
  2012年   140315篇
  2011年   148216篇
  2010年   130986篇
  2009年   130980篇
  2008年   133512篇
  2007年   143370篇
  2006年   150915篇
  2005年   145122篇
  2004年   145946篇
  2003年   135778篇
  2002年   124390篇
  2001年   197249篇
  2000年   194214篇
  1999年   174307篇
  1998年   75858篇
  1997年   70573篇
  1996年   68758篇
  1995年   64336篇
  1994年   58172篇
  1993年   53998篇
  1992年   128569篇
  1991年   123387篇
  1990年   118835篇
  1989年   115374篇
  1988年   106264篇
  1987年   104322篇
  1986年   98416篇
  1985年   95826篇
  1984年   77787篇
  1983年   68461篇
  1982年   51625篇
  1981年   47709篇
  1980年   44728篇
  1979年   67688篇
  1978年   53045篇
  1977年   46609篇
  1976年   43240篇
  1975年   44063篇
  1974年   48996篇
  1973年   46932篇
  1972年   43928篇
  1971年   40620篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Abstract

Purpose

Financial hardship can be a major cause of distress among persons with cancer, resulting in chronic stress and impacting physical and emotional health. This paper provides an analysis of the lived experience of cancer patients’ financial hardship from diagnosis to post-treatment.  相似文献   
52.
53.
54.
55.
56.
57.
58.
Purpose

This paper describes the design of a theory-informed pragmatic intervention for adolescent perinatal depression in primary care in Nigeria.

Methods

We conducted Focus Group Discussions (FGDs) among 17 adolescent mothers and 25 maternal health care providers with experience in the receipt and provision of care for perinatal depression. The Consolidated Framework for Implementation Research (CFIR) was used to systematically examine the barriers and facilitators affecting adolescent mothers' use of an existing intervention package for depression. The Theoretical Domain Framework (TDF) and the Capability, Opportunity, Motivation, Behaviour (COM-B) model were used to analyze the results of the data across the five CFIR domains.

Results

FGD analysis revealed that care providers lacked knowledge on approaches to engage young mothers in treatment. Young mothers had poor treatment engagement, low social support, and little interest in parenting. A main characteristic of the newly designed intervention is the inclusion of age-appropriate psychoeducation supported with weekly mobile phone calls, to address treatment engagement and parenting behaviours of young mothers. Also in the outer setting, low social support from relatives was addressed with education, “as need arises” phone calls, and the involvement of "neighborhood mothers”. In the inner settings, care providers’ behaviour is addressed with training to increase their capacity to engage young mothers in treatment.

Conclusion

A theory-based approach helped develop an age-appropriate intervention package targeting depression and parenting skills deficit among perinatal adolescents in primary maternal care and in which a pragmatic use of mobile phone was key.

  相似文献   
59.
Major depressive disorder and other neuropsychiatric disorders are often managed with long-term use of antidepressant medication. Fluoxetine, an SSRI antidepressant, is widely used as a first-line treatment for neuropsychiatric disorders. However, fluoxetine has also been shown to increase the risk of metabolic diseases such as non-alcoholic fatty liver disease. Fluoxetine has been shown to increase hepatic lipid accumulation in vivo and in vitro. In addition, fluoxetine has been shown to alter the production of prostaglandins which have also been implicated in the development of non-alcoholic fatty liver disease. The goal of this study was to assess the effect of fluoxetine exposure on the prostaglandin biosynthetic pathway and lipid accumulation in a hepatic cell line (H4-II-E-C3 cells). Fluoxetine treatment increased mRNA expression of prostaglandin biosynthetic enzymes (Ptgs1, Ptgs2, and Ptgds), PPAR gamma (Pparg), and PPAR gamma downstream targets involved in fatty acid uptake (Cd36, Fatp2, and Fatp5) as well as production of 15-deoxy-Δ12,14PGJ2 a PPAR gamma ligand. The effects of fluoxetine to induce lipid accumulation were attenuated with a PTGS1 specific inhibitor (SC-560), whereas inhibition of PTGS2 had no effect. Moreover, SC-560 attenuated 15-deoxy-Δ12,14PGJ2 production and expression of PPAR gamma downstream target genes. Taken together these results suggest that fluoxetine-induced lipid abnormalities appear to be mediated via PTGS1 and its downstream product 15d-PGJ2 and suggest a novel therapeutic target to prevent some of the adverse effects of fluoxetine treatment.  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