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   10066篇
  免费   552篇
  国内免费   33篇
耳鼻咽喉   165篇
儿科学   197篇
妇产科学   302篇
基础医学   1627篇
口腔科学   1145篇
临床医学   658篇
内科学   2018篇
皮肤病学   240篇
神经病学   820篇
特种医学   156篇
外科学   1220篇
综合类   43篇
一般理论   10篇
预防医学   844篇
眼科学   244篇
药学   584篇
中国医学   43篇
肿瘤学   335篇
  2023年   74篇
  2022年   72篇
  2021年   273篇
  2020年   215篇
  2019年   256篇
  2018年   341篇
  2017年   220篇
  2016年   276篇
  2015年   298篇
  2014年   403篇
  2013年   541篇
  2012年   816篇
  2011年   903篇
  2010年   461篇
  2009年   426篇
  2008年   684篇
  2007年   688篇
  2006年   560篇
  2005年   488篇
  2004年   445篇
  2003年   379篇
  2002年   352篇
  2001年   209篇
  2000年   174篇
  1999年   135篇
  1998年   39篇
  1997年   30篇
  1996年   30篇
  1995年   25篇
  1994年   30篇
  1993年   23篇
  1992年   55篇
  1991年   52篇
  1990年   46篇
  1989年   33篇
  1988年   47篇
  1987年   37篇
  1986年   41篇
  1985年   46篇
  1984年   22篇
  1983年   31篇
  1982年   21篇
  1981年   21篇
  1979年   24篇
  1975年   23篇
  1974年   17篇
  1972年   18篇
  1971年   23篇
  1970年   33篇
  1969年   19篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.

Objective

Assess the impact of a web-based gamification program on nutrition literacy of families and explore differences in impact by socioeconomic status.

Design

Quasi-experimental.

Setting

Thirty-seven kindergartens from Portugal.

Participants

Eight hundred seventy-seven families.

Intervention

Web-based social network of participants' interactions, educational materials, apps and nutritional challenges, focused on fruit, vegetables, sugar, and salt.

Main Outcome Measures

Parental nutrition literacy (self-reported survey – 4 dimensions: Nutrients, Food portions, Portuguese food wheel groups, Food labeling).

Analysis

General linear model – Repeated measures was used to analyze the effect on the nutrition literacy score.

Results

Families uploaded 1267 items (recipes, photographs of challenges) and educators uploaded 327 items (photographs, videos) onto the interactive platform. For the intervention group (n?=?106), the final mean (SD) score of nutrition literacy was significantly higher than the baseline: 78.8% (15.6) vs 72.7% (16.2); P < .001, regardless of parental education and perceived income status. No significant differences in the scores of the control group (n?=?83) were observed (final 67.8% [16.1] vs initial 66.4% [15.6]; P?=?.364).

Conclusions and Implications

Gamified digital interactive platform seems to be a useful, easily adapted educational tool for the healthy eating learning process. Future implementations of the program will benefit from longer time intervention and assessment of the eating habits of families before and after intervention.  相似文献   
2.
Aim: Clerkship-specific interactive reflective writing (IRW)-enhanced reflection may enhance professional identity formation (PIF), a fundamental goal of medical education. PIF process as revealed in students? reflective writing (RW) has been understudied.

Methods: The authors developed an IRW curriculum within a Family Medicine Clerkship (FMC) and analyzed students? reflections about challenging/difficult patient encounters using immersion-crystallization qualitative analysis.

Results: The qualitative analysis identified 26 unique emergent themes and five distinct thematic categories (1. Role of emotions, 2. Role of cognition, 3. Behaviorally responding to situational context, 4. Patient factors, and 5. External factors) as well as an emergent PIF model from a directed content analysis. The model describes students? backgrounds, emotions and previous experiences in medicine merging with external factors and processed during student?patient interactions. The RWs also revealed that processing often involves polarities (e.g. empathy/lack of empathy or encouragement/disillusionment) as well as dissonance between idealized visions and lived reality.

Conclusions: IRW facilitates and ideally supports grappling with the lived reality of medicine; uncovering a “positive hidden curriculum” within medical education. The authors propose engaging learners in guided critical reflection about complex experiences for meaning-making within a safe learning climate as a valuable way to cultivate reflective, resilient professionals with “prepared” minds and hearts for inevitable challenges of healthcare practice.  相似文献   
3.
Background: Primary progressive aphasia (PPA) is a neurodegenerative dementia in which language decline is the first and most prominent symptom. Among several interventions for PPA, language rehabilitation has been the most frequently used.

Aims: This narrative review aimed to evaluate existing standardised language tests used in the assessment of PPA, in order to determine whether they are appropriate and psychometrically adequate to detect change over time in the treatment of anomia.

Main Contribution: The present findings highlight the scarcity of psychometrically robust instruments used to measure therapy-induced gains in PPA. Additionally, most of these instruments were not validated for use with the PPA population, which consequently might bias the results. There is a need for population-based norms for existing instruments.

Conclusions: The accurate assessment of lexico-semantic deficits in PPA should rely on objective, reliable, valid, and responsive outcome measures. Psychometric studies are needed to evaluate and eventually improve the quality of language tests used in clinical practice.  相似文献   

4.
5.
6.
7.
8.
Background:No other disease has killed more than ischemic heart disease (IHD) for the past few years globally. Despite the advances in cardiology, the response time for starting treatment still leads patients to death because of the lack of healthcare coverage and access to referral centers.Objectives:To analyze the spatial disparities related to IHD mortality in the Parana state, Brazil.Methods:An ecological study using secondary data from Brazilian Health Informatics Department between 2013–2017 was performed to verify the IHD mortality. An spatial analysis was performed using the Global Moran and Local Indicators of Spatial Association (LISA) to verify the spatial dependency of IHD mortality. Lastly, multivariate spatial regression models were also developed using Ordinary Least Squares and Geographically Weighted Regression (GWR) to identify socioeconomic indicators (aging, income, and illiteracy rates), exam coverage (catheterization, angioplasty, and revascularization rates), and access to health (access index to cardiologists and chemical reperfusion centers) significantly correlated with IHD mortality. The chosen model was based on p < 0.05, highest adjusted R2 and lowest Akaike Information Criterion.Results:A total of 22,920 individuals died from IHD between 2013–2017. The spatial analysis confirmed a positive spatial autocorrelation global between IDH mortality rates (Moran’s I: 0.633, p < 0.01). The LISA analysis identified six high-high pattern clusters composed by 66 municipalities (16.5%). GWR presented the best model (Adjusted R2: 0.72) showing that accessibility to cardiologists and chemical reperfusion centers, and revascularization and angioplasty rates differentially affect the IHD mortality rates geographically. Aging and illiteracy rate presented positive correlation with IHD mortality rate, while income ratio presented negative correlation (p < 0.05).Conclusion:Regions of vulnerability were unveiled by the spatial analysis where sociodemographic, exam coverage and accessibility to health variables impacted differently the IHD mortality rates in Paraná state, Brazil.Highlights
  • The increase in ischemic heart disease mortality rates is related to geographical disparities.
  • The IHD mortality is differentially associated to socioeconomic factors, exam coverage, and access to health.
  • Higher accessibility to chemical reperfusion centers did not necessarily improve patient outcomes in some regions of the state.
  • Clusters of high mortality rate are placed in regions with low amount of cardiologists, income and schooling.
  相似文献   
9.
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