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   2051111篇
  免费   161964篇
  国内免费   7645篇
耳鼻咽喉   27416篇
儿科学   66359篇
妇产科学   57102篇
基础医学   285070篇
口腔科学   56518篇
临床医学   180843篇
内科学   417253篇
皮肤病学   46913篇
神经病学   167379篇
特种医学   83841篇
外国民族医学   596篇
外科学   321916篇
综合类   47042篇
现状与发展   2篇
一般理论   638篇
预防医学   159762篇
眼科学   44957篇
药学   145464篇
  5篇
中国医学   3724篇
肿瘤学   107920篇
  2018年   20523篇
  2016年   18569篇
  2015年   21007篇
  2014年   29681篇
  2013年   44961篇
  2012年   56951篇
  2011年   60923篇
  2010年   37740篇
  2009年   36480篇
  2008年   57498篇
  2007年   61433篇
  2006年   62431篇
  2005年   60866篇
  2004年   58080篇
  2003年   56539篇
  2002年   54389篇
  2001年   96643篇
  2000年   99579篇
  1999年   83735篇
  1998年   24559篇
  1997年   22141篇
  1996年   22859篇
  1995年   22478篇
  1994年   21117篇
  1993年   19763篇
  1992年   68281篇
  1991年   66020篇
  1990年   63972篇
  1989年   61117篇
  1988年   56738篇
  1987年   55706篇
  1986年   52964篇
  1985年   50880篇
  1984年   38628篇
  1983年   32664篇
  1982年   20189篇
  1981年   17956篇
  1980年   16994篇
  1979年   35062篇
  1978年   25149篇
  1977年   21221篇
  1976年   19689篇
  1975年   20977篇
  1974年   24867篇
  1973年   23730篇
  1972年   22248篇
  1971年   20510篇
  1970年   19035篇
  1969年   17911篇
  1968年   16862篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
14.
15.
16.
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   
17.
18.
19.
Gestational trophoblastic neoplasia (GTN) patients are treated according to the eight-variable International Federation of Gynaecology and Obstetrics (FIGO) scoring system, that aims to predict first-line single-agent chemotherapy resistance. FIGO is imperfect with one-third of low-risk patients developing disease resistance to first-line single-agent chemotherapy. We aimed to generate simplified models that improve upon FIGO. Logistic regression (LR) and multilayer perceptron (MLP) modelling (n = 4191) generated six models (M1-6). M1, all eight FIGO variables (scored data); M2, all eight FIGO variables (scored and raw data); M3, nonimaging variables (scored data); M4, nonimaging variables (scored and raw data); M5, imaging variables (scored data); and M6, pretreatment hCG (raw data) + imaging variables (scored data). Performance was compared to FIGO using true and false positive rates, positive and negative predictive values, diagnostic odds ratio, receiver operating characteristic (ROC) curves, Bland-Altman calibration plots, decision curve analysis and contingency tables. M1-6 were calibrated and outperformed FIGO on true positive rate and positive predictive value. Using LR and MLP, M1, M2 and M4 generated small improvements to the ROC curve and decision curve analysis. M3, M5 and M6 matched FIGO or performed less well. Compared to FIGO, most (excluding LR M4 and MLP M5) had significant discordance in patient classification (McNemar's test P < .05); 55-112 undertreated, 46-206 overtreated. Statistical modelling yielded only small gains over FIGO performance, arising through recategorisation of treatment-resistant patients, with a significant proportion of under/overtreatment as the available data have been used a priori to allocate primary chemotherapy. Streamlining FIGO should now be the focus.  相似文献   
20.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  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