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   600篇
  免费   64篇
  国内免费   10篇
儿科学   3篇
妇产科学   4篇
基础医学   56篇
口腔科学   2篇
临床医学   150篇
内科学   148篇
皮肤病学   6篇
神经病学   100篇
特种医学   4篇
外科学   17篇
综合类   59篇
预防医学   48篇
眼科学   7篇
药学   17篇
中国医学   3篇
肿瘤学   50篇
  2024年   2篇
  2023年   14篇
  2022年   10篇
  2021年   15篇
  2020年   16篇
  2019年   29篇
  2018年   16篇
  2017年   24篇
  2016年   17篇
  2015年   29篇
  2014年   42篇
  2013年   56篇
  2012年   31篇
  2011年   41篇
  2010年   28篇
  2009年   30篇
  2008年   31篇
  2007年   46篇
  2006年   30篇
  2005年   31篇
  2004年   20篇
  2003年   14篇
  2002年   15篇
  2001年   16篇
  2000年   12篇
  1999年   5篇
  1998年   11篇
  1997年   9篇
  1996年   6篇
  1995年   2篇
  1994年   4篇
  1993年   3篇
  1992年   3篇
  1991年   4篇
  1990年   2篇
  1988年   2篇
  1987年   1篇
  1983年   2篇
  1982年   2篇
  1980年   1篇
  1974年   1篇
  1969年   1篇
排序方式: 共有674条查询结果,搜索用时 15 毫秒
121.
We perceived a need for relatives’ evaluation of geriatric care and rehabilitation during the care period as well as the first few weeks after discharge. The aim of this study was therefore to develop and test a questionnaire for use in telephone interviews with relatives of patients discharged from geriatric wards to measure their perceptions of the quality of care. The instrument development process comprised a literature review, focus group interviews, construction of items, test of content validity, a pilot study and finally the main data collection to test the construct validity and reliability. A Likert‐type questionnaire was used containing 26 items with five response alternatives; totally disagree, partly disagree, doubtful, partly agree and totally agree. The main data collection comprised 238 telephone interviews. The factor analysis revealed four factors with an eigenvalue >1.0. Cronbach’s alpha coefficient was 0.89, which indicates high reliability. The duration of the telephone interview was approximately 10–20 minutes. The relatives appreciated the opportunity to evaluate the care, and a majority stated that they preferred a telephone interview to answering in writing. The questionnaire is considered reliable, valid and useful for identifying areas in need of quality improvement interventions.  相似文献   
122.
123.
本文以肺癌患者的外周血为材料,进行了其染色体的不稳定性和脆性部位的分析。实验组血液样本从11位肺癌患者身上取得,正常对照血液从7位健康人身上取得,一级亲属对照的血样取自于7位健康的一级亲属。外周血淋巴细胞在37℃的条件下,于Tc199培养基中培养96小时。利用常规法和G显带技术制备染色体标本,镜检分析。结果表时患者与正常人之间有显著性差异,但一级亲属与正常人及患者之间无差异。  相似文献   
124.
We used the affected-pedigree-member (APM) method to conduct linkage analyses on 19 pedigrees in which the probands had premenopausal bilateral breast cancer. This method analyzes all affected pairs of relatives, as opposed to siblings only, and incorporates into the analyses information on the frequency of marker alleles. Fourteen codominant marker systems were evaluated in two separate analyses. In the first, only premenopausal cases of breast cancer were coded as affected because we assumed that postmenopausal cases were due to a different etiology. In the second analysis, all cases of breast cancer were coded as affected, irrespective of menopausal status. In the premenopausal-cases-only analysis, we observed evidence suggestive of nonindependent segregation for C3 and ESD. In the all-cases analysis, we observed much weaker evidence for C3 and ESD and noted a suggestion of nonindependent segregation for AMY2 and PGM1.  相似文献   
125.
Autism: The Phenotype in Relatives   总被引:12,自引:0,他引:12  
There is broad agreement that genetic influences are central in the development of idiopathic autism. Whether relatives manifest genetically related milder phenotypes, and if so how these relate to autism proper, has proved a more contentious issue. A review of the relevant studies indicates that relatives are sometimes affected by difficulties that appear conceptually related to autistic behaviors. These range in severity from pervasive developmental disorders to abnormalities in only one area of functioning, and possibly extend to related personality traits. Issues involved in clarifying the components of milder phenotypes and their relationship to autism are outlined.  相似文献   
126.
PrognosisofpatientswithbreastcancerdependsmostlyonthestageofdiseaseatthetimeofpresentationItishighlydesirabletodiagnoseearlystagediseasesoastoimprovethesurvivalrateTodate,mammographicexaminationistheonlystandardmethodforbreastcancerscreeningHowever,it…  相似文献   
127.
128.
129.
This study sought to investigate whether first-degree relatives of depressed patients report, and react to, sleep perceptions in the same way as the depressed group. Our previous research suggested that depressed individuals may experience greater sleep 'distress' than healthy individuals; we wished to explore whether this was also apparent in their nearest relatives. A sample was recruited of 18 antidepressant-treated patients with a current DSM-IV diagnosis of major depressive disorder, 18 healthy controls, and a group of 10 first-degree relatives for each study group. In accordance with previous findings, poorer sleep perceptions corresponded with poorer life-quality and mood perceptions, and depressed individuals reported poorer sleep perceptions and poorer life-quality/mood perceptions than controls. Additionally, there was evidence of similar sleep reporting between depressed patients and their relatives, and for a difference between these relatives and other non-depressed groups. There was a non-significant trend for depressed patients, and their relatives, to report total sleep time in the same manner as each other, and differently to other non-depressed groups. Reports of poor sleep may be associated with reports of poor mood in depression, but in non-depressed individuals the association may be with a feeling of weariness.  相似文献   
130.
目的探讨老年期痴呆患者一级亲属的生活质量状况。方法采用生活质量综合评定问卷-74(GQOLI-74)对48例老年期痴呆患者亲属及与之相匹配的48例已婚健康受试者进行评定。结果老年期痴呆患者GQOLI-74维度评分和总体生活状态评分均明显低于正常对照组(t=1.97-1.98;P〈0.05或t=2.51-2.66;P〈0.01)具有统计学意义。其中以躯体健康和心理健康尤为显著。结论老年期痴呆患者一级亲属的生活质量较正常对照者差,并涉及到心身健康的多个方面。  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