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   28556篇
  免费   1452篇
  国内免费   580篇
耳鼻咽喉   771篇
儿科学   4728篇
妇产科学   298篇
基础医学   1553篇
口腔科学   371篇
临床医学   2957篇
内科学   1927篇
皮肤病学   136篇
神经病学   2305篇
特种医学   818篇
外科学   2414篇
综合类   3828篇
预防医学   4748篇
眼科学   343篇
药学   2457篇
  22篇
中国医学   570篇
肿瘤学   342篇
  2024年   48篇
  2023年   406篇
  2022年   823篇
  2021年   1167篇
  2020年   914篇
  2019年   956篇
  2018年   911篇
  2017年   867篇
  2016年   1055篇
  2015年   905篇
  2014年   2278篇
  2013年   2150篇
  2012年   1964篇
  2011年   2095篇
  2010年   1609篇
  2009年   1601篇
  2008年   1567篇
  2007年   1562篇
  2006年   1273篇
  2005年   1048篇
  2004年   805篇
  2003年   603篇
  2002年   472篇
  2001年   498篇
  2000年   426篇
  1999年   330篇
  1998年   255篇
  1997年   206篇
  1996年   188篇
  1995年   159篇
  1994年   166篇
  1993年   126篇
  1992年   82篇
  1991年   89篇
  1990年   96篇
  1989年   100篇
  1988年   77篇
  1987年   59篇
  1986年   40篇
  1985年   90篇
  1984年   64篇
  1982年   56篇
  1981年   48篇
  1980年   40篇
  1979年   49篇
  1978年   49篇
  1977年   30篇
  1976年   51篇
  1974年   32篇
  1973年   30篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
In recent years, children’s well-being has become a hot research topic that has been increasingly gaining attention in the field of psychiatry, social work, psychology, and public health research. The present study was meant to explore the existing children’s mental health service strategies and practices in Addis Ababa, Ethiopia. The data have been carefully collected through open-ended interviews and focus group discussions, by capturing the participants’ experiences. This study counted with the participation of managers of child-serving organizations, mental health workers (psychologists, psychiatric nurses, social workers, and psychiatrists), orphans, and vulnerable children, including their guardians. The findings indicated limited access to specialized treatment, inadequate skilled human resources, lack of mental health education, and depicted that the local community preferred traditional medicine and religious healing practices in order to cure mental illnesses. Children’s mental health services are at a disadvantage and the most neglected health program, needing urgent involvement of the local government, non-governmental organizations, researchers, and policymakers, amongst several other stakeholders.  相似文献   
993.
994.
This study aimed at investigating the reliability and validity of the Arabic Screen for Child Anxiety Related Emotional Disorders (SCARED) as a first child and adolescent anxiety screening tool in the Arab World. The English parent (SCARED-P) and child (SCARED-C) versions were translated into Arabic and administered along with the Arabic Strengths and Difficulties Questionnaire (SDQ) to 77 parents and 67 children attending a Psychiatry clinic. DSM-IV-TR diagnoses were made by a psychiatrist without knowledge of the scale scores. Internal consistency was confirmed by Cronbach's α=0.92 for SCARED-P and 0.91 for SCARED-C. Their subscales had internal consistencies between 0.65 and 0.89. Parent–child agreement was r=0.67, p<0.001. SCARED-P demonstrated good discriminant validity between participants with anxiety disorders and those with other psychiatric disorders (t(72)=3.13, p=0.003). For SCARED-C, this difference was significant when participants with depressive disorders were excluded (t(43)=2.58, p=0.01). Convergent validity was evident through a significant correlation between SCARED-P and the parent SDQ emotional subscale (r=0.70, p<0.001), and SCARED-C and the child SDQ emotional subscale (r=0.70, p<0.001). Divergent validity with the SDQ hyperactivity subscale was observed as no significant correlation was found. Overall, the Arabic SCARED demonstrated satisfactory psychometric properties in a clinical sample in Lebanon.  相似文献   
995.
《Neurological research》2013,35(4):288-294
Abstract

Objectives:

Academic achievement in children with epilepsy is a highly studied topic with many important implications. However, only little attention has been devoted to academic self-concept of such children and the relation of academic self-concept to their quality of life. We aimed to examine academic self-concept in children with epilepsy, to assess its relationship to academic achievement and to determine possible correlations between academic self-concept and quality of life.

Methods:

The study group consisted of 182 children and adolescents aged 9–14 years who completed the student’s perception of ability scale (SPAS) questionnaire to determine their academic self-concept and the modified Czech version of the CHEQOL-25 questionnaire to determine their health-related quality of life.

Results:

We found that academic self-concept in children with epilepsy was on average significantly lower than in their peers without seizures, especially with regard to general school-related abilities, reading, and spelling. On the other hand, the variance in the data obtained from the group of children with epilepsy was significantly higher than in the whole population and the proportion of individuals with very high academic self-concept seems comparable among children with and without epilepsy. Moreover, it was found that correlations between academic self-concept and academic achievement are significantly lower in children with epilepsy than in the whole population.

Discussion:

The presented results suggest that considerable attention should be paid to the role of academic self-concept in education of children with epilepsy and to the factors influencing this self-concept in this group.  相似文献   
996.
The study of lingual gnosis and praxis skills of children aged from 4.5 years old to 9.5 years old has been realized on normal children and on children under speech therapy for speech and language disorder. The comparison of normal children between our research and the one of Tardieu shows that today's children aged between 6.5 and 9.5 years have lower gnostic skills than in 1973. We observe a lingual gnostic deficit for children of all ages receiving speech therapy, the gap tending to fade as they get older. It seems appropriate to integrate a speech-language assessment test to better understand the gnostic deficit of children with a verbal orality and/or eating disorder. Such information would help to define the therapeutic approach of the speech therapy and thus promote the education gnoso-oral praxis early.  相似文献   
997.
The phonology of two groups of SLI (n =5) and LD (n =5) children was analysed at age 3 and compared with two control groups: an age control (n =5) and a language level control (measured using the MLU-W) (n =5). Children with SLI and LD showed a delay in the acquisition of segments, syllabic structures and word structures, and in the simplification processes, compared with their age control group. However, SLI children also displayed significant differences vis-à-vis their language level controls, mainly in early acquisitions: vowels, nasals and stops at the segmental level, and in CV structures at the syllabic level. There is also a simplification process that seems to be more prevalent in these children than in their language level controls, namely, the deletion of unstressed syllables, mainly initial ones. The results enable SLI to be distinguished from LD and suggest that the development of SLI phonology is deviant. This deviation is interpreted as being a plateau in early acquisitions when later acquisitions have already appeared. The results are considered in the light of Leonard's surface hypothesis and an exclusively linguistic cause for this disorder is ruled out.  相似文献   
998.
999.
1000.
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