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   129774篇
  免费   16554篇
  国内免费   1925篇
耳鼻咽喉   4249篇
儿科学   4329篇
妇产科学   1911篇
基础医学   2476篇
口腔科学   1183篇
临床医学   21442篇
内科学   37974篇
皮肤病学   5943篇
神经病学   12058篇
特种医学   5085篇
外科学   32738篇
综合类   195篇
现状与发展   60篇
一般理论   1篇
预防医学   5803篇
眼科学   2625篇
药学   789篇
中国医学   6篇
肿瘤学   9386篇
  2024年   604篇
  2023年   4038篇
  2022年   1181篇
  2021年   2493篇
  2020年   4816篇
  2019年   1795篇
  2018年   5922篇
  2017年   5841篇
  2016年   6742篇
  2015年   6714篇
  2014年   12377篇
  2013年   12553篇
  2012年   4372篇
  2011年   4425篇
  2010年   8336篇
  2009年   11428篇
  2008年   4629篇
  2007年   3253篇
  2006年   5164篇
  2005年   2997篇
  2004年   2402篇
  2003年   1607篇
  2002年   1633篇
  2001年   3026篇
  2000年   2397篇
  1999年   2581篇
  1998年   2881篇
  1997年   2776篇
  1996年   2728篇
  1995年   2557篇
  1994年   1542篇
  1993年   1243篇
  1992年   1112篇
  1991年   1128篇
  1990年   845篇
  1989年   926篇
  1988年   792篇
  1987年   667篇
  1986年   700篇
  1985年   583篇
  1984年   450篇
  1983年   416篇
  1982年   425篇
  1981年   323篇
  1980年   283篇
  1979年   251篇
  1978年   245篇
  1977年   308篇
  1975年   228篇
  1972年   234篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
21.
The clinical features of cystic hygroma are presented. The effect on mandibular morphology is described, and surgical correction of the deformities is discussed.  相似文献   
22.
23.
Previous studies have shown that dental utilization by older people is lower than for the general population. This study hypothesizes that an elder's tendency toward participating in preventive health activities may be an important factor in explaining the likelihood of accessing the dentist. Subjects included 1,911 older individuals who enrolled in the UCLA Medicare Screening and Health Promotion Trial. All were interviewed about their utilization of preventive health services and participation in preventive behaviors. A recent dental visit was positively associated with all sociodemographic variables examined except age and sex. It was also related to health status questions and utilization of the preventive health services and health behaviors studied. Logistic regression analysis showed that both summary preventive health behavior and preventive service utilization variables were important factors in explaining a recent dental visit (model chi-square/221.4, P=.001) along with income, not having a removable prosthesis, and perceiving the need for dental care. This study showed that dental utilization is related to older people's participation in other preventive activities. When in contact with older people, health care professionals should consider current oral and general preventive health status and encourage appropriate referral for preventive activities.  相似文献   
24.
The adenomatoid odontogenic tumour of the jaws is rare. It is important to differentiate it from other odontogenic tumours because of its benign behaviour and this can be reliably done by the histological features.  相似文献   
25.
26.
Myositis ossificans traumatica of the masseter muscle is uncommon. The condition is benign and results in reactive heterotopic bone formation, usually producing limitation of opening of the jaws. Radiographic and microscopic examination can confirm the diagnosis. Treatment of myositis ossificans traumatica of the masseter muscle is surgical, with other modalities used when occurring in other muscles of the body  相似文献   
27.
Objectives: A survey was conducted to study smokers' oral health behaviors and attitudes, and to determine if smokers were advised by their dentists to quit smoking. Methods : A random sample of 1,200 adults 15 to 64 years of age living in the province of North Karelia, Finland, was selected in each of two study years (1990 and 1991) and surveyed using a mail questionnaire. The 102-item questionnaire solicited information on smoking status, oral health behaviors, missing teeth, perceptions of tobacco's harmful effects on oral health, smoking status and quitting, and advice on smoking cessation provided by dentists. Variations in behaviors and opinions according to smoking status were analyzed. Results : Nonsmokers reported more frequent healthy oral health behaviors than did daily smokers, with the exception that no difference in toothbrushing frequencies existed among women. Daily smoking was associated with increased use of sugar in tea or coffee, and with more frequent alcohol consumption. Daily smoking was correlated with the number of missing teeth in bivariate analyses, but not in multivariate analyses. Fewer daily smokers than nonsmokers considered smoking to have harmful effects on oral health. The majority of daily smokers, however, wanted to quit. Eight percent of daily smokers reported that they had been advised by their dentist to quit. Conclusions : Dentists need to provide patients with counseling on tobacco use because of the desire of many smokers to quit. Counseling of smokers by the oral health team requires special attention and skills, because smokers' health behaviors and attitudes appear to be less favorable to oral health compared to nonsmokers.  相似文献   
28.
29.
30.
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