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   13033篇
  免费   634篇
  国内免费   80篇
耳鼻咽喉   54篇
儿科学   214篇
妇产科学   107篇
基础医学   1865篇
口腔科学   335篇
临床医学   822篇
内科学   3592篇
皮肤病学   171篇
神经病学   863篇
特种医学   619篇
外科学   1988篇
综合类   68篇
一般理论   2篇
预防医学   436篇
眼科学   239篇
药学   774篇
中国医学   17篇
肿瘤学   1581篇
  2023年   68篇
  2022年   53篇
  2021年   225篇
  2020年   138篇
  2019年   188篇
  2018年   239篇
  2017年   197篇
  2016年   261篇
  2015年   245篇
  2014年   360篇
  2013年   456篇
  2012年   725篇
  2011年   752篇
  2010年   415篇
  2009年   369篇
  2008年   673篇
  2007年   704篇
  2006年   675篇
  2005年   653篇
  2004年   621篇
  2003年   607篇
  2002年   654篇
  2001年   281篇
  2000年   263篇
  1999年   272篇
  1998年   157篇
  1997年   104篇
  1996年   136篇
  1995年   125篇
  1994年   97篇
  1993年   99篇
  1992年   254篇
  1991年   252篇
  1990年   226篇
  1989年   266篇
  1988年   238篇
  1987年   199篇
  1986年   179篇
  1985年   181篇
  1984年   135篇
  1983年   123篇
  1982年   65篇
  1981年   67篇
  1979年   115篇
  1978年   57篇
  1977年   51篇
  1975年   51篇
  1974年   52篇
  1973年   51篇
  1972年   44篇
排序方式: 共有10000条查询结果,搜索用时 93 毫秒
1.
2.
3.
4.
5.
6.
7.
Neuromyelitis optica (NMO) is a severe inflammatory demyelinating disease with exacerbations involving recurrent or bilateral optic neuritis and longitudinally extensive transverse myelitis. Pulse steroid therapy is recommended as the initial, acute‐phase treatment for NMO. If ineffective, treatment with plasma exchange (PE) should commence. However, no evidence exists to support the effectiveness of PE long after the acute phase. Immunoadsorption therapy (IA) eliminates pathogenic antibodies while sparing other plasma proteins. With IA, side effects of PE resulting from protein substitution can be avoided. However, whether IA is effective for NMO remains unclear. We describe a patient with anti‐aquaporin‐4‐positive myelitis who responded to IA using a tryptophan polyvinyl alcohol gel column that was begun 52 days after disease onset following the acute phase. Even long after the acute phase when symptoms appear to be stable, IA may be effective and should not be excluded as a treatment choice. J. Clin. Apheresis 30:43–45, 2015. © 2014 Wiley Periodicals, Inc.  相似文献   
8.
9.
10.
ObjectivesEating alone is associated with an increased risk of depression symptoms. This association may be confounded by poor social networks. The present study aimed to determine the role of poor social networks in the association of eating alone with depression symptoms, focusing on cohabitation status.MethodsSeven hundred and ten community-dwelling older adults were categorized according to their eating style and social network size, evaluated using an abbreviated version of the Lubben Social Network Scale, with poor social network size (defined as the lowest quartile). Living arrangements and depression symptoms, detected using the Zung Self-Rating Depression Scale, were also assessed.ResultsA mixed-design two-way analysis of covariance (eating style and social network size factors) for the depression scale score, adjusted by covariates, yielded significant effects of social network size and eating style without interaction. Greater depression scores were observed in eating alone and poor social network size. Analysis of participants living with others showed the same results. However, among older adults living alone, only a significant main effect of social network size was observed; poor social network size resulted in greater depression scores irrespective of eating style.ConclusionsPoor social network size, and not eating alone, was associated with greater depression symptoms among older adults living alone, whereas both factors may increase depression symptoms among older adults living with others. Poor social network size may show a stronger influence on depression than eating alone in older adults living alone; thus, social network size is an important health indicator.Key words: eating alone, social network, living alone, depression, older adults  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