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   55653篇
  免费   4163篇
  国内免费   247篇
耳鼻咽喉   581篇
儿科学   1789篇
妇产科学   1409篇
基础医学   7709篇
口腔科学   796篇
临床医学   5830篇
内科学   11301篇
皮肤病学   1066篇
神经病学   6563篇
特种医学   1580篇
外科学   5422篇
综合类   570篇
一般理论   65篇
预防医学   6534篇
眼科学   1084篇
药学   3468篇
中国医学   87篇
肿瘤学   4209篇
  2023年   687篇
  2022年   1136篇
  2021年   2284篇
  2020年   1352篇
  2019年   1875篇
  2018年   2147篇
  2017年   1443篇
  2016年   1618篇
  2015年   1774篇
  2014年   2219篇
  2013年   2886篇
  2012年   4579篇
  2011年   4540篇
  2010年   2336篇
  2009年   2081篇
  2008年   3314篇
  2007年   3290篇
  2006年   3142篇
  2005年   2966篇
  2004年   2694篇
  2003年   2391篇
  2002年   2063篇
  2001年   504篇
  2000年   439篇
  1999年   519篇
  1998年   433篇
  1997年   354篇
  1996年   292篇
  1995年   268篇
  1994年   206篇
  1993年   194篇
  1992年   260篇
  1991年   260篇
  1990年   257篇
  1989年   217篇
  1988年   210篇
  1987年   224篇
  1986年   204篇
  1985年   231篇
  1984年   166篇
  1983年   143篇
  1982年   114篇
  1981年   121篇
  1980年   105篇
  1979年   131篇
  1978年   124篇
  1977年   102篇
  1976年   93篇
  1974年   101篇
  1973年   105篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
While previous randomised controlled trials and meta-analyses offer only limited evidence for the effectiveness of cognitive rehabilitation, qualitative studies examining patient perspectives report more positive outcomes. This meta-synthesis of qualitative studies examined patient perspectives of cognitive rehabilitation for memory, attention, and executive function problems in people with multiple sclerosis. Using set eligibility criteria, we screened electronic databases, reference lists, and academic networks for relevant papers. Seven papers (195 participants) were selected. Two independent researchers conducted quality appraisals of papers. Data analysis, guided by the thematic synthesis approach, yielded six main themes. These suggested that patients benefitted from the group environment in rehabilitation. Cognitive rehabilitation facilitated the participants’ reflection and awareness of their cognitive deficits, and was associated with increased knowledge and understanding of their illness. Increased strategy use was reported and associated with improvements in cognitive functioning and greater confidence and perseverance. Participants reported emotional and social improvements, and felt more optimistic. Overall, these changes had a positive impact on participants’ quality of life. This synthesis of qualitative studies indicates that people with multiple sclerosis who experience cognitive deficits benefit from cognitive rehabilitation programmes. This finding must, however, be viewed in light of the limitations of this meta-synthesis. The meta-synthesis was registered in the PROSPERO database under CRD42017040148.  相似文献   
3.
4.
5.
Behçet disease is a complex, multisystem disease characterized by recurrent oral and genital ulcerations. It rarely occurs in infants or children. Neonatal Behçet disease has been reported in infants whose ulcers resolve at or before 9 weeks of age. Few cases of neonatal Behçet disease persisting into childhood have previously been reported. We report the case of a 1‐month‐old infant who presented with severe recurrent genital ulcerations and at 6 months developed recurrent oral ulcerations. Her orogenital ulcerations continue to recur. Human leukocyte antigen testing revealed HLA‐B51 and B44 positivity. This is a case of pediatric Behçet disease in the neonatal period. Behçet disease should be considered in the differential diagnosis of recurrent genital and oral ulcerations in infants and children.  相似文献   
6.
7.
8.
9.
Individuals with sudden unilateral deafness offer a unique opportunity to study plasticity of the binaural auditory system in adult humans. Stimulation of the intact ear results in increased activity in the auditory cortex. However, there are no reports of changes at sub-cortical levels in humans. Therefore, the aim of the present study was to investigate changes in sub-cortical activity immediately before and after the onset of surgically induced unilateral deafness in adult humans. Click-evoked auditory brainstem responses (ABRs) to stimulation of the healthy ear were recorded from ten adults during the course of translabyrinthine surgery for the removal of a unilateral acoustic neuroma. This surgical technique always results in abrupt deafferentation of the affected ear. The results revealed a rapid (within minutes) reduction in latency of wave V (mean pre = 6.55 ms; mean post = 6.15 ms; p < 0.001). A latency reduction was also observed for wave III (mean pre = 4.40 ms; mean post = 4.13 ms; p < 0.001). These reductions in response latency are consistent with functional changes including disinhibition or/and more rapid intra-cellular signalling affecting binaurally sensitive neurons in the central auditory system. The results are highly relevant for improved understanding of putative physiological mechanisms underlying perceptual disorders such as tinnitus and hyperacusis.  相似文献   
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