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   236694篇
  免费   11681篇
  国内免费   400篇
耳鼻咽喉   3122篇
儿科学   7320篇
妇产科学   4806篇
基础医学   34075篇
口腔科学   5720篇
临床医学   18647篇
内科学   52213篇
皮肤病学   6343篇
神经病学   21207篇
特种医学   7109篇
外国民族医学   101篇
外科学   29421篇
综合类   981篇
一般理论   63篇
预防医学   21477篇
眼科学   4669篇
药学   16644篇
中国医学   719篇
肿瘤学   14138篇
  2023年   1266篇
  2022年   869篇
  2021年   3472篇
  2020年   2078篇
  2019年   3937篇
  2018年   7515篇
  2017年   4946篇
  2016年   4936篇
  2015年   5528篇
  2014年   5766篇
  2013年   9289篇
  2012年   16251篇
  2011年   16294篇
  2010年   8061篇
  2009年   5989篇
  2008年   14008篇
  2007年   14972篇
  2006年   13814篇
  2005年   13621篇
  2004年   12778篇
  2003年   11642篇
  2002年   10965篇
  2001年   6155篇
  2000年   6246篇
  1999年   5537篇
  1998年   898篇
  1997年   749篇
  1996年   712篇
  1992年   3221篇
  1991年   2890篇
  1990年   2754篇
  1989年   2510篇
  1988年   2382篇
  1987年   2204篇
  1986年   2101篇
  1985年   1897篇
  1984年   1406篇
  1983年   1193篇
  1982年   674篇
  1979年   1207篇
  1978年   852篇
  1977年   801篇
  1975年   807篇
  1974年   993篇
  1973年   1000篇
  1972年   944篇
  1971年   931篇
  1970年   862篇
  1969年   910篇
  1968年   797篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
IntroductionPeople with Down syndrome (DS) have high respiratory morbidity, evaluating their respiratory health with standardized, objective tests is desirable. Thus, the objective of this study was to evaluate the technical quality of Pulmonary Function Tests (PFTs) to determine which ones are most suitable for this population.MethodsParticipants included children, teenagers and adults with DS, 5 years of age or older (n = 302). The technical quality of the impulse oscillometry system (IOS), forced spirometry, lung-diffusing capacity for carbon monoxide (DLCO), and 6-min walk test (6MWT) were analyzed by age group. Capnography and pulse oximetry were included in the study. Technical quality was determined on the basis of current international PFTs standards.ResultsFifty-one percent of participants were males. A total of 184 participants (71%) who completed the IOS fulfilled the quality criteria, while 210 (70%) completed the 6MWT. Performance on forced spirometry and DLCO was poor. All pulse oximetries and 96% percent heart rates obtained had good quality, but exhaled carbon dioxide (PetCO2) and respiratory rate (RR) showed deficient repeatability.ConclusionsIOS appears to be the most reliable instrument for evaluating lung mechanics in individuals with DS.  相似文献   
84.
85.
86.
87.
88.

Objective

To explore from a gender perspective the association with subjective health of the interaction between education and household arrangements within the framework of social determinants of health placed at the micro and mezzo levels.

Methods

The data comes from the Spanish sample of the European Union Statistics on Income and Living Conditions for 2014. Independent logistic regression models for men and women were run to analyze the association with subjective health of the interaction between education and household arrangements. An additive model was run to assess possible advantages over the interaction approach.

Results

The interaction models show a lower or even no significant effect on health of household arrangements usually negatively associated with health among individuals with high education, displaying specific patterns according to sex.

Conclusions

Health profiles of women and men are more precisely drawn if both social determinants of health are combined. Among the women, the important role was confirmed of both social determinants of health in understanding their health inequalities. Among the men, mainly those with low educational achievement, the interaction revealed that the household was a more meaningful social determinant of health. This could enable the definition of more efficient public policies to reduce health and gender inequalities.  相似文献   
89.
90.
Conservation Genetics Resources - Fifteen polymorphic microsatellite markers were developed for Tridacna maxima in order to assess self-recruitment and larval dispersal within and among MPAs in New...  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