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   48341篇
  免费   3644篇
  国内免费   196篇
耳鼻咽喉   382篇
儿科学   1525篇
妇产科学   1236篇
基础医学   7025篇
口腔科学   599篇
临床医学   5135篇
内科学   10101篇
皮肤病学   899篇
神经病学   5783篇
特种医学   1199篇
外科学   4469篇
综合类   407篇
一般理论   59篇
预防医学   5672篇
眼科学   622篇
药学   3099篇
中国医学   87篇
肿瘤学   3882篇
  2024年   42篇
  2023年   607篇
  2022年   789篇
  2021年   2172篇
  2020年   1322篇
  2019年   1800篇
  2018年   2067篇
  2017年   1388篇
  2016年   1550篇
  2015年   1702篇
  2014年   2074篇
  2013年   2697篇
  2012年   4334篇
  2011年   4255篇
  2010年   2191篇
  2009年   1910篇
  2008年   3069篇
  2007年   2987篇
  2006年   2869篇
  2005年   2666篇
  2004年   2369篇
  2003年   2127篇
  2002年   1805篇
  2001年   278篇
  2000年   217篇
  1999年   262篇
  1998年   369篇
  1997年   272篇
  1996年   226篇
  1995年   200篇
  1994年   133篇
  1993年   129篇
  1992年   103篇
  1991年   102篇
  1990年   109篇
  1989年   89篇
  1988年   81篇
  1987年   83篇
  1986年   67篇
  1985年   66篇
  1984年   73篇
  1983年   71篇
  1982年   37篇
  1981年   55篇
  1980年   49篇
  1979年   44篇
  1978年   31篇
  1977年   35篇
  1976年   28篇
  1975年   26篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
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   
5.
6.
Coxiella burnetii is an obligate intracellular Gram-negative bacterium that causes the zoonotic disease Q fever. Although Q fever is mainly transmitted by aerosol infection, study of the immune responses in the lung following pulmonary C. burnetii infection is lacking. Neutrophils are considered the first immune cell to migrate into the lung and play an important role in host defense against aerosol infection with microbial pathogens. However, the role of neutrophils in the host defense against C. burnetii infection remains unclear. To determine the role of neutrophils in protective immunity against C. burnetii infection, the RB6-8C5 antibody was used to deplete neutrophils in mice before intranasal infection with C. burnetii. The results indicated that neutrophil-depleted mice developed more severe disease than their wild-type counterparts, suggesting that neutrophils play an important role in host defense against C. burnetii pulmonary infection. We also found that neither CXC chemokine receptor 2 (CXCR2) nor interleukin-17 (IL-17) receptor (IL-17R) deficiency changed the severity of disease following intranasal C. burnetii challenge, suggesting that keratinocyte-derived chemokine and IL-17 may not play essential roles in the response to C. burnetii infection. However, significantly higher C. burnetii genome copy numbers were detected in the lungs of IL-1R−/− mice at 14 days postinfection. This indicates that IL-1 may be important for the clearance of C. burnetii from the lungs following intranasal infection. Our results also suggest that neutrophils are involved in protecting vaccinated mice from C. burnetii challenge-induced disease. This is the first study to demonstrate an important role for neutrophils in protective immunity against C. burnetii infection.  相似文献   
7.
8.
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   
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