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   198966篇
  免费   23146篇
  国内免费   1256篇
耳鼻咽喉   3138篇
儿科学   6114篇
妇产科学   5111篇
基础医学   14436篇
口腔科学   6480篇
临床医学   39556篇
内科学   40961篇
皮肤病学   4795篇
神经病学   20857篇
特种医学   5364篇
外国民族医学   33篇
外科学   25382篇
综合类   1107篇
现状与发展   40篇
一般理论   140篇
预防医学   25037篇
眼科学   3275篇
药学   6212篇
  3篇
中国医学   143篇
肿瘤学   15184篇
  2024年   1033篇
  2023年   5816篇
  2022年   2201篇
  2021年   4793篇
  2020年   6754篇
  2019年   4392篇
  2018年   9266篇
  2017年   8990篇
  2016年   9747篇
  2015年   9944篇
  2014年   13088篇
  2013年   16424篇
  2012年   10189篇
  2011年   10306篇
  2010年   10323篇
  2009年   12208篇
  2008年   9250篇
  2007年   8709篇
  2006年   9693篇
  2005年   7999篇
  2004年   7259篇
  2003年   6579篇
  2002年   6060篇
  2001年   2472篇
  2000年   1608篇
  1999年   2296篇
  1998年   3115篇
  1997年   2705篇
  1996年   2649篇
  1995年   2299篇
  1994年   1656篇
  1993年   1476篇
  1992年   1143篇
  1991年   988篇
  1990年   843篇
  1989年   778篇
  1988年   780篇
  1987年   637篇
  1986年   585篇
  1985年   557篇
  1984年   548篇
  1983年   594篇
  1982年   610篇
  1981年   558篇
  1980年   406篇
  1979年   261篇
  1978年   295篇
  1977年   292篇
  1976年   239篇
  1975年   191篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Society often expects mothers and fathers to share equally in the perinatal grief process because the child was a common bond between them. Unfortunately, in perinatal grief, this is not always the case. The mother and the father can experience incongruent grieving and use discordant coping mechanisms. It is important to evaluate these differences to facilitate communication between the distraught parents. Improved communication can in turn facilitate the grieving process.  相似文献   
32.
33.
34.
Gedo  Mary M. 《JAMA》2002,288(8):928
  相似文献   
35.
The polymorphism at the HLA-DPB1 locus has been characterized in a large number of patients with multiple sclerosis (n = 112) and in healthy controls (n = 115). Both patients and controls lived in the southwest of France (in the Pyrénées Atlantiques) and had similar ethnic background. The typing procedure involved the selective amplification of the second exon of the DPB1 locus by polymerase chain reaction, followed by hybridization of the amplified DNA with 14 sequence-specific oligonucleotide probes. Individual alleles were identified by the pattern of hybridization of the different probes. The distribution of the DPB1 alleles was not significantly different in multiple sclerosis patients and controls (p = 0.11). This does not corroborate the reported association of multiple sclerosis with the primed lymphocyte typing (PLT)-defined DPw4 specificity and is not in favour of a role played by polymorphic residues of the DP molecule in susceptibility to multiple sclerosis.  相似文献   
36.
37.
38.
Directors of nursing at 23 nursing homes with Alzheimer's units in Southwestern Pennsylvania completed a self‐reported survey of 12 questions. Responses from the self‐administered questionnaires (100% response rate) revealed a wide variation in the staff categories assessing the oral health status of newly admitted residents with AD. The respondents described oral examinations that were incomplete when compared to the oral indicators listed in the Minimum Data Set. All nursing homes reported that oral hygiene was provided each day. The number of residents in a facility had a significant effect on the frequency of oral hygiene provided. Only 52% of the facilities reported yearly oral examinations for this population. According to the respondents, dental treatment was typically performed on‐site. The oral health care costs were paid by Medicare, Medicaid, the residents/family members, or by other undescribed resources. Insufficient time, staff, and training, as well as uncooperative behavior, were identified as barriers to optimum oral health care for residents with AD. Additional staff, specialized training, and increased government reimbursement were suggested to improve the oral health care for this group of older adults. For future studies, review of medical records and on‐site evaluation of the oral health care at these facilities should be required to verify the reported practices.  相似文献   
39.
40.
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