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   4180篇
  免费   324篇
  国内免费   17篇
耳鼻咽喉   8篇
儿科学   119篇
妇产科学   81篇
基础医学   778篇
口腔科学   89篇
临床医学   394篇
内科学   716篇
皮肤病学   161篇
神经病学   534篇
特种医学   150篇
外科学   384篇
综合类   28篇
预防医学   410篇
眼科学   49篇
药学   287篇
中国医学   13篇
肿瘤学   320篇
  2023年   37篇
  2022年   21篇
  2021年   112篇
  2020年   85篇
  2019年   131篇
  2018年   129篇
  2017年   128篇
  2016年   127篇
  2015年   169篇
  2014年   174篇
  2013年   262篇
  2012年   360篇
  2011年   359篇
  2010年   220篇
  2009年   195篇
  2008年   339篇
  2007年   329篇
  2006年   272篇
  2005年   245篇
  2004年   239篇
  2003年   169篇
  2002年   197篇
  2001年   23篇
  2000年   19篇
  1999年   21篇
  1998年   24篇
  1997年   12篇
  1996年   7篇
  1995年   11篇
  1994年   13篇
  1993年   11篇
  1992年   7篇
  1990年   6篇
  1989年   5篇
  1988年   4篇
  1987年   5篇
  1986年   3篇
  1984年   9篇
  1983年   4篇
  1982年   3篇
  1981年   4篇
  1980年   3篇
  1979年   2篇
  1978年   2篇
  1977年   5篇
  1975年   2篇
  1974年   2篇
  1973年   2篇
  1968年   3篇
  1962年   2篇
排序方式: 共有4521条查询结果,搜索用时 31 毫秒
1.
2.
Child Psychiatry & Human Development - Longitudinal research of CSA in infancy and early childhood is scarce. The current study examined the long-term course of psychological outcomes (PTSD,...  相似文献   
3.

Purpose

To quantify eating disorder (ED) stability and diagnostic transition among a community-based sample of adolescents and young adult females in the United States.

Methods

Using 11 prospective assessments from 9,031 U.S. females ages 9–15 years at baseline of the Growing Up Today Study, we classified cases of the following EDs involving bingeing and purging: bulimia nervosa (BN), binge ED, purging disorder (PD), and subthreshold variants defined by less frequent (monthly vs. weekly) bingeing and purging behaviors. We measured number of years symptomatic and probability of maintaining symptoms, crossing to another diagnosis, or resolving symptoms across consecutive surveys.

Results

Study lifetime disorder prevalence was 2.1% for BN and roughly 6% each for binge ED and PD. Most cases reported symptoms during only one survey year. Twenty-six percent of cases crossed between diagnoses during follow-up. Among participants meeting full threshold diagnostic criteria, transition from BN was most prevalent, crossing most frequently from BN to PD (12.9% of BN cases). Within each disorder phenotype, 20%–40% of cases moved between subthreshold and full threshold criteria across consecutive surveys.

Conclusions

Diagnostic crossover is not rare among adolescent and young adult females with an ED. Transition patterns from BN to PD add support for considering these classifications in the same diagnostic category of disorders that involve purging. The prevalence of crossover between monthly and weekly symptom frequency suggests that a continuum or staging approach may increase utility of ED classification for prognostic and therapeutic intervention.  相似文献   
4.
5.
6.
7.
8.
9.
Background and objectivesMany frameworks describing primary care (PC) organization exist. This study proposes a consolidated framework based on the synthesis of published frameworks for the assessment of primary care organization and performance.ApproachWe conducted a review of the literature to identify relevant existing frameworks that aimed to describe PC organization or/and monitor its activities. First, we extracted all domains from the frameworks and then hierarchically organized them into domains, dimensions and elements. Second, we mapped key domains. Third, we grouped together domains covering the same field to build a consolidated framework. Finally, the consolidated framework was assessed by 10 international experts in PC evaluation using a survey.ResultsWe retained seven frameworks. The consolidated framework comprises four domains: 1) population needs; 2) organization and structure of PC practices; 3) delivery of PC services and 4) patient and population health outcomes. We added five connecting constructs to the framework in order to link the domains: accessibility, appropriateness, productivity, efficiency, effectiveness, equity and integration. None of the previously published frameworks encompassed all domains, dimensions and elements of the new consolidated framework.ConclusionWe propose a consolidated framework of PC organization based on the synthesis of seven published frameworks. This unitary framework may provide a foundation for comparative assessment across various contexts to support researchers and policy makers.  相似文献   
10.
Journal of Neurology - Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease with loss of muscle function. The pathogenesis is still unclear and the heterogeneity of ALS...  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