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   1442189篇
  免费   119603篇
  国内免费   6604篇
耳鼻咽喉   18538篇
儿科学   46351篇
妇产科学   38934篇
基础医学   197980篇
口腔科学   40288篇
临床医学   127161篇
内科学   304035篇
皮肤病学   35429篇
神经病学   118659篇
特种医学   58018篇
外国民族医学   275篇
外科学   223758篇
综合类   32075篇
现状与发展   2篇
一般理论   445篇
预防医学   116967篇
眼科学   30518篇
药学   101196篇
  5篇
中国医学   2675篇
肿瘤学   75087篇
  2019年   11664篇
  2018年   17791篇
  2017年   13215篇
  2016年   15155篇
  2015年   16925篇
  2014年   23017篇
  2013年   34417篇
  2012年   44535篇
  2011年   47624篇
  2010年   28814篇
  2009年   27039篇
  2008年   43390篇
  2007年   46237篇
  2006年   46840篇
  2005年   45360篇
  2004年   42789篇
  2003年   41402篇
  2002年   39105篇
  2001年   69096篇
  2000年   71328篇
  1999年   58991篇
  1998年   16435篇
  1997年   14489篇
  1996年   15487篇
  1995年   16389篇
  1994年   15225篇
  1993年   14232篇
  1992年   48098篇
  1991年   46647篇
  1990年   44736篇
  1989年   42459篇
  1988年   39263篇
  1987年   38613篇
  1986年   36395篇
  1985年   35078篇
  1984年   26679篇
  1983年   22322篇
  1982年   13935篇
  1981年   12523篇
  1980年   11772篇
  1979年   23809篇
  1978年   17190篇
  1977年   14510篇
  1976年   13313篇
  1975年   13933篇
  1974年   16347篇
  1973年   15685篇
  1972年   14427篇
  1971年   13294篇
  1970年   12133篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Modified-release opioids are often prescribed for the management of moderate to severe acute pain following total hip and knee arthroplasty, despite recommendations against their use due to increasing concerns regarding harm. The primary objective of this multicentre study was to examine the impact of modified-release opioid use on the incidence of opioid-related adverse events compared with immediate-release opioid use, among adult inpatients following total hip or knee arthroplasty. Data for total hip and knee arthroplasty inpatients receiving an opioid analgesic for postoperative analgesia during hospitalisation were collected from electronic medical records of three tertiary metropolitan hospitals in Australia. The primary outcome was the incidence of opioid-related adverse events during hospital admission. Patients who received modified with or without immediate-release opioids were matched to those receiving immediate-release opioids only (1:1) using nearest neighbour propensity score matching with patient and clinical characteristics as covariates. This included total opioid dose received. In the matched cohorts, patients given modified-release opioids (n = 347) experienced a higher incidence of opioid-related adverse events overall, compared with those given immediate-release opioids only (20.5%, 71/347 vs. 12.7%, 44/347; difference in proportions 7.8% [95%CI 2.3–13.3%]). Modified-release opioid use was associated with an increased risk of harm when used for acute pain during hospitalisation after total hip or knee arthroplasty.  相似文献   
2.
3.
4.
5.
6.
Odontology - The purpose of this study was to investigate whether the root perforation repair with mineral aggregate-based cements affects the retention of customized fiberglass posts to bovine...  相似文献   
7.
8.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
9.
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   
10.
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