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   19714篇
  免费   1552篇
  国内免费   31篇
耳鼻咽喉   186篇
儿科学   724篇
妇产科学   607篇
基础医学   2633篇
口腔科学   223篇
临床医学   2600篇
内科学   3409篇
皮肤病学   307篇
神经病学   2347篇
特种医学   377篇
外科学   1883篇
综合类   203篇
现状与发展   1篇
一般理论   20篇
预防医学   2849篇
眼科学   193篇
药学   1284篇
  1篇
中国医学   16篇
肿瘤学   1434篇
  2024年   26篇
  2023年   217篇
  2022年   307篇
  2021年   794篇
  2020年   496篇
  2019年   691篇
  2018年   774篇
  2017年   589篇
  2016年   672篇
  2015年   669篇
  2014年   806篇
  2013年   1236篇
  2012年   1752篇
  2011年   1753篇
  2010年   872篇
  2009年   763篇
  2008年   1185篇
  2007年   1269篇
  2006年   1136篇
  2005年   1022篇
  2004年   969篇
  2003年   814篇
  2002年   782篇
  2001年   115篇
  2000年   91篇
  1999年   116篇
  1998年   147篇
  1997年   114篇
  1996年   80篇
  1995年   80篇
  1994年   62篇
  1993年   56篇
  1992年   63篇
  1991年   49篇
  1990年   37篇
  1989年   55篇
  1988年   54篇
  1987年   57篇
  1986年   48篇
  1985年   42篇
  1984年   56篇
  1983年   37篇
  1982年   42篇
  1981年   39篇
  1980年   33篇
  1979年   22篇
  1978年   17篇
  1977年   12篇
  1976年   17篇
  1975年   28篇
排序方式: 共有10000条查询结果,搜索用时 625 毫秒
51.
The presentation aims to examine the criteria of quality for care and education programmes for young disabled children in integrated early childhood settings. The conceptual and practical issues which influence quality programmes will be discussed with particular reference to the Integration Programmes operated throughout South Australia in early childhood centres.

The Integration Programmes, developed to enable and support the integrated or normalised development of young children has as its specific 'target' group individual children who are 'too delayed or disabled' to be able to fully participate or participate without direct assistance in community based early childhood programmes. Some of these children are extremely disabled and others' handicapping conditions are exacerbated by severe lack of other available community resources, isolation and other factors.

Integration is more than 'being there'—it is a complex process based upon the recognition of human value and human rights. For greater insight into the Integration Programmes an appraisal of the following aspects will be provided.

• the principles of integration

• the goals of integration

• the dimensions of integration.

The dimensions of integration will be placed in relation to the indicators of quality in early childhood programmes. The juxtaposing of these parameters of quality will lead to the emergence of guidelines for practical goalsetting and evaluation hallmarks of excellence in integration.  相似文献   
52.
Summary The DSM-III-R incorporates both distress (symptoms) and disability (impairment) in the definition of a psychiatric disorder. In psychiatric research there is a wide array of instruments used to measure symptom severity, but a limited selection for the assessment of impairment. The psychometric properties of one such instrument, The Sheehan Disability Scale (Sheehan 1983), are evaluated in this paper. The data analyzed come from two studies of patients with panic disorder, the Cross National Collaborative Panic Study-Phase I and the Panic Depression Study. In this report both the alpha coefficients and factor analyses indicate that the reliability of the scale is acceptable. The factor structure of the items and the sensitivity to change of their composite demonstrate satisfactory construct validity. The criterion-related validity is substantiated by the significant relationship between symptomatology and impairment. These analyses were limited to patients with panic disorder. Further work is needed to evaluate the instrument in assessing patients with other disorders.  相似文献   
53.
54.
Background: Physical activity has been positively linked to quality of life (QOL) in older adults. Measures of health status and global well-being represent common methods of assessing QOL outcomes, yet little has been done to determine the nature of the relationship of these outcomes with physical activity.Purpose: We examined the roles played by physical activity, health status, and self-efficacy in global QOL (satisfaction with life) in a sample of older Black and White women.Method: Participants (N = 249, M age = 68.12 years) completed multiple indicators of physical activity, self-efficacy, health status, and QOL at baseline of a 24-month prospective trial. Structural equation modeling examined the fit of 3 models of the physical activity and QOL relationship.Results: Analyses indicated that relationships between physical activity and QOL, self-efficacy and QOL were all indirect. Specifically, physical activity influenced self-efficacy and QOL through physical and mental health status, which in turn influenced global QOL.Conclusions: Our findings support a social cognitives model of physical activity’s relationship with QOL. Subsequent tests of hypothesized relationships across time are recommended. Funding for this study was provided by the National Institute on Aging (Grant AG 20118). We extend our sincere appreciation to April Bell for all of her efforts on this project.  相似文献   
55.
56.
57.
58.
Prematurity Stereotyping by Mothers of Premature Infants   总被引:2,自引:1,他引:1  
Previous research has experimentally documented a prematuritystereotype in college students and mothers of full-term infants.The present investigation extends the scope of earlier studiesto mothers of premature infants. Thirty-two mothers of prematureinfants viewed four videotapes of 9-month-old full-term infants,each labeled either full-term or premature and either male orfemale. When infants were labeled premature the mothers perceivedthem as littler, finer featured, weaker, more passive, and slowerthan infants labeled full-term. The mothers also perceived labeledboys as bigger than labeled girls. Differences in stereotypingbetween the mothers in this study and both mothers of full-terminfants and college students are identified and discussed. Resultssuggest that mothers of premature infants expect deficits inpremature infants' physical development but not in prematureinfants' mental or social development. The likely sources andpossible self-fulfilling nature of these biased perceptionsare considered  相似文献   
59.
60.
BACKGROUND: Limited knowledge exists regarding the neurobiology of trichotillomania (TTM). Cerebellum (CBM) volumes were explored, given its role in complex, coordinated motor sequences. METHODS: Morphometric magnetic resonance imaging (MRI) scans were obtained for 14 female subjects with DSM-IV diagnoses of TTM and 12 age-, education-, and gender-matched normal control (NC) participants. Parcellation was performed utilizing a recently developed methodology to measure subterritory volumes of the CBM. Regions were defined based on knowledge of the structural and functional subunits of the CBM. RESULTS: As predicted, significant group differences were reported for CBM raw cortical volumes (p = .008) that survived correction for total brain volume (TBV; p = .037) and head circumference (HC; p = .011). A priori and post hoc group raw volume comparisons for CBM subterritories and functional clusters revealed many significant differences. However, most differences failed to withstand correction for total CBM volumes (TCV). Smaller volumes were consistently reported for the TTM versus NC cohorts. Total Massachusetts General Hospital Hair Pulling Scale (MGHHPS) scores were significantly inversely correlated with left primary sensorimotor cluster volumes (p = .008), with smaller volumes associated with more severe TTM symptoms. CONCLUSIONS: These findings implicate the CBM in the neurobiology of TTM, with reduced subterritory volumes reported for the TTM versus NC groups.  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