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   1330976篇
  免费   114814篇
  国内免费   6353篇
耳鼻咽喉   16696篇
儿科学   42959篇
妇产科学   36629篇
基础医学   182597篇
口腔科学   36301篇
临床医学   120279篇
内科学   276563篇
皮肤病学   31876篇
神经病学   109854篇
特种医学   55530篇
外国民族医学   274篇
外科学   210101篇
综合类   31566篇
现状与发展   2篇
一般理论   416篇
预防医学   106115篇
眼科学   28184篇
药学   93609篇
  5篇
中国医学   2152篇
肿瘤学   70435篇
  2018年   13397篇
  2017年   10650篇
  2016年   12813篇
  2015年   14326篇
  2014年   19983篇
  2013年   29798篇
  2012年   36336篇
  2011年   38994篇
  2010年   24426篇
  2009年   23957篇
  2008年   36457篇
  2007年   38857篇
  2006年   39991篇
  2005年   38551篇
  2004年   36791篇
  2003年   35807篇
  2002年   33825篇
  2001年   66006篇
  2000年   67799篇
  1999年   56322篇
  1998年   15990篇
  1997年   14225篇
  1996年   15237篇
  1995年   16167篇
  1994年   15058篇
  1993年   14087篇
  1992年   47070篇
  1991年   45765篇
  1990年   43970篇
  1989年   41815篇
  1988年   38743篇
  1987年   38073篇
  1986年   35869篇
  1985年   34655篇
  1984年   26349篇
  1983年   22074篇
  1982年   13824篇
  1981年   12417篇
  1980年   11675篇
  1979年   23525篇
  1978年   17035篇
  1977年   14346篇
  1976年   13147篇
  1975年   13701篇
  1974年   16078篇
  1973年   15396篇
  1972年   14187篇
  1971年   13031篇
  1970年   11866篇
  1969年   11109篇
排序方式: 共有10000条查询结果,搜索用时 31 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.
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   
7.
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   
8.
Die Anaesthesiologie - Phantomschmerzen haben eine hohe Prävalenz nach Majoramputationen und sind mit einer zusätzlichen Einschränkung der Lebensqualität verbunden....  相似文献   
9.
During first outburst of COVID-19, several strategies had been applied for surgical oncology patients to minimize COVID-19 transmission. COVID-19 infection seemed to compromise survival and major complication rates of surgical oncology patients. However, survival, tumor progression and recurrence rates of surgical oncology patients were associated to the consequences of COVID-19 pandemic on their management. In addition, the severity of COVID-19 infections has been downgraded. Therefore, management of surgical oncology patients should be reconsidered.  相似文献   
10.
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