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   2392654篇
  免费   190443篇
  国内免费   9793篇
耳鼻咽喉   30671篇
儿科学   78293篇
妇产科学   65573篇
基础医学   339914篇
口腔科学   65939篇
临床医学   225663篇
内科学   475106篇
皮肤病学   52864篇
神经病学   198785篇
特种医学   92585篇
外国民族医学   622篇
外科学   352787篇
综合类   55350篇
现状与发展   3篇
一般理论   838篇
预防医学   200805篇
眼科学   51975篇
药学   172427篇
  11篇
中国医学   4935篇
肿瘤学   127744篇
  2018年   26496篇
  2017年   20419篇
  2016年   23329篇
  2015年   26404篇
  2014年   36646篇
  2013年   56092篇
  2012年   72398篇
  2011年   77428篇
  2010年   46654篇
  2009年   44369篇
  2008年   71374篇
  2007年   75730篇
  2006年   76991篇
  2005年   74447篇
  2004年   70971篇
  2003年   68301篇
  2002年   65516篇
  2001年   109696篇
  2000年   112808篇
  1999年   94655篇
  1998年   28246篇
  1997年   25382篇
  1996年   25966篇
  1995年   25566篇
  1994年   23949篇
  1993年   22453篇
  1992年   77425篇
  1991年   75570篇
  1990年   72941篇
  1989年   69312篇
  1988年   64424篇
  1987年   63132篇
  1986年   59966篇
  1985年   57645篇
  1984年   43919篇
  1983年   37053篇
  1982年   22930篇
  1981年   20482篇
  1980年   19165篇
  1979年   39739篇
  1978年   28796篇
  1977年   23922篇
  1976年   22751篇
  1975年   23496篇
  1974年   28160篇
  1973年   27202篇
  1972年   25153篇
  1971年   23310篇
  1970年   21422篇
  1969年   19825篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
24.
25.
26.
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   
27.
28.
Cognitive Therapy and Research - Despite interest in psychological inflexibility as a marker of suicide risk, no measure of psychological inflexibility specific to SI exists. The present study...  相似文献   
29.
30.
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   
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