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   35109篇
  免费   3387篇
  国内免费   395篇
耳鼻咽喉   326篇
儿科学   2173篇
妇产科学   373篇
基础医学   3938篇
口腔科学   533篇
临床医学   3037篇
内科学   2659篇
皮肤病学   250篇
神经病学   14585篇
特种医学   328篇
外科学   1212篇
综合类   2617篇
现状与发展   2篇
一般理论   1篇
预防医学   2850篇
眼科学   137篇
药学   2805篇
  7篇
中国医学   795篇
肿瘤学   263篇
  2024年   96篇
  2023年   856篇
  2022年   1021篇
  2021年   1813篇
  2020年   1705篇
  2019年   1647篇
  2018年   1527篇
  2017年   1598篇
  2016年   1628篇
  2015年   1439篇
  2014年   2339篇
  2013年   3268篇
  2012年   1823篇
  2011年   2233篇
  2010年   1720篇
  2009年   1712篇
  2008年   1788篇
  2007年   1635篇
  2006年   1346篇
  2005年   1147篇
  2004年   936篇
  2003年   853篇
  2002年   740篇
  2001年   539篇
  2000年   422篇
  1999年   369篇
  1998年   413篇
  1997年   336篇
  1996年   262篇
  1995年   211篇
  1994年   181篇
  1993年   164篇
  1992年   168篇
  1991年   156篇
  1990年   129篇
  1989年   122篇
  1988年   111篇
  1987年   85篇
  1986年   43篇
  1985年   80篇
  1984年   51篇
  1983年   32篇
  1982年   51篇
  1981年   26篇
  1980年   20篇
  1979年   14篇
  1978年   11篇
  1977年   10篇
  1976年   7篇
  1974年   4篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
41.
42.
BackgroundThe positive effect of a father’s involvement in children’s upbringing is now recognised. However, research on fathers raising children with autism spectrum disorder (ASD) are still few. This study examines the relationship between the perception, fathers of children with ASD have of the importance of their role in the development of their children and the feelings (self-efficacy, caregiving burden, satisfaction) they express about their parenting experience.MethodSixty-three Swiss Italian fathers of children with ASD completed The Role of the Father Questionnaire (ROFQ), three sub-scales of the Caregiver Survey, a subtest of the Child Adjustment and Parent Efficacy Scale and a home-made questionnaire measuring Perceived Social Support.ResultsThe results from hierarchical multiple regression analyses show that the importance that fathers attach to the paternal role predicts positively their caregiving satisfaction and their feeling of self-efficacy. The children’s challenging behaviours predict positively the caregiving burden whereas the assessment of social support predicts it negatively.ConclusionsThe perception of the importance of the paternal role needs to be considered in the support offered to families with a child with ASD. A better understanding of the fathers’ feelings could be of value for the programmes.  相似文献   
43.
44.
45.
46.
Children with a specific learning disorder (SLD) are often characterized by marked intellectual strengths and weaknesses. In the last few years, research has focused on a common discrepancy between low working memory and processing speed on the one hand, and high verbal and visuoperceptual intelligence on the other. SLD profiles featuring a specific discrepancy between verbal and visuoperceptual abilities have been only marginally considered, however, and their systematic comparison vis-à-vis typically-developing (TD) populations has yet to be conducted. The present study examined a dataset of 1624 WISC-IV profiles of children with a diagnosis of SLD. It emerged that the proportion of children with a Verbal Comprehension Index (VCI) at least 1.5 SD (22 standardized points) lower than their scores on the Perceptual Reasoning Index (PRI) was larger than the proportion of SLD children with the opposite discrepant profile; it was also larger than the same proportion found among TD children. Comparing the two discrepant profiles revealed that the children also differed by type of learning difficulty, gender, and performance in the WISC-IV Symbol search task. Further examination suggested that children who were discrepant and also distinctly poor in visuoperceptual intelligence were particularly slow in general processing.  相似文献   
47.
48.
BackgroundAutism spectrum disorder is a condition that affects all races, ethnic and socioeconomic groups. With a high incidence ratio of one in every 68, it has become one of the most discussed psychiatric disorders. For this reason, the need for investigating novel treatments has been emerging. Qigong, a traditional Chinese mind-body technique, has already proven to be able to reduce symptoms of several physical and psychological illnesses.ObjectiveThe purpose of this systematic review is to examine and categorize the current scientific evidence regarding the efficacy of Qigong on children suffering from autism spectrum disorders.Search strategyA systematic literature search of the electronic scientific databases PubMed, Clinical Trials.gov, BioMed Central, PubMed Central and Google Scholar was performed to identify studies of Qigong in the treatment of children with autism spectrum disorder.Inclusion criteriaThis review included randomized controlled trials, replication studies, retrospective studies and observational follow-up studies of Qigong on children with autism spectrum disorder. Case reports and case series were excluded.Data extraction and analysisTwo researchers independently evaluated the methodological quality of all included studies. Any discrepancies were solved by discussion until consensus was achieved.ResultsOur literature search identified 157 publications, and 10 additional publications from hand search of references. After duplicate removal, 103 records remained. After the title/abstract screening, 19 publications were obtained for detailed evaluation. After detailed evaluation, 10 studies were included. Seven studies were conducted with small children with 2–6 years old employing Qigong massage, and three studies were conducted with older children aged 7–17 years old applying both Qigong massage (one study) and Neigong (two studies).ConclusionStudies demonstrated that Qigong has interesting and promising applicability and effect on children with autism spectrum disorder and should be tested further. Despite the need for more rigorous controlled studies, Qigong seems to be able to decrease severity of individual sensory, behavioural, and language components of autism, and improve self-control, sociability, sensory and cognitive awareness as well as healthy-physical behaviour. Besides positive effect on children and adolescents, benefits seem to extend to parents and caregivers as well. However, quality of methodology seems to be insufficient to state that Qigong is an alternative to common behavioural therapies. We suggest that, until more investigation is performed, Qigong may only be used as a complement, or when behavioural therapies are not accessible.  相似文献   
49.
50.
《L'Encéphale》2022,48(2):188-195
Depressive disorder is characterized by a polymorphic symptomatology associating emotional, cognitive and behavioral disturbances. One of the most specific symptoms is negative beliefs, called congruent to mood. Despite the importance of these beliefs in the development, the maintenance, and the recurrence of depressive episodes, little is known about the processes underlying the generation of depressive beliefs. In this paper, we detail the link between belief updating mechanisms and the genesis of depressive beliefs. We show how depression alters information processing, generating cognitive immunization when processing positive information, affective updating bias related to the valence of belief and prediction error, and difficultie to disengage from negative information. We suggest that disruption of belief-updating mechanisms forms the basis of belief-mood congruence in depression.  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