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   532424篇
  免费   27771篇
  国内免费   513篇
耳鼻咽喉   6706篇
儿科学   17049篇
妇产科学   12560篇
基础医学   92882篇
口腔科学   12353篇
临床医学   48678篇
内科学   96168篇
皮肤病学   11883篇
神经病学   34198篇
特种医学   19795篇
外国民族医学   55篇
外科学   78460篇
综合类   7613篇
现状与发展   2篇
一般理论   107篇
预防医学   38630篇
眼科学   12135篇
药学   41568篇
  1篇
中国医学   1127篇
肿瘤学   28738篇
  2021年   3933篇
  2018年   5793篇
  2017年   4162篇
  2016年   4895篇
  2015年   5383篇
  2014年   7162篇
  2013年   10585篇
  2012年   15676篇
  2011年   17495篇
  2010年   10022篇
  2009年   8884篇
  2008年   15811篇
  2007年   17589篇
  2006年   17075篇
  2005年   16382篇
  2004年   15982篇
  2003年   15353篇
  2002年   14891篇
  2001年   22514篇
  2000年   23067篇
  1999年   19004篇
  1998年   5259篇
  1997年   4377篇
  1996年   4418篇
  1995年   4138篇
  1992年   14467篇
  1991年   15856篇
  1990年   16000篇
  1989年   15679篇
  1988年   14335篇
  1987年   14247篇
  1986年   13213篇
  1985年   12720篇
  1984年   9420篇
  1983年   8022篇
  1982年   4184篇
  1979年   8954篇
  1978年   6387篇
  1977年   5156篇
  1976年   5516篇
  1975年   6634篇
  1974年   7440篇
  1973年   7170篇
  1972年   6612篇
  1971年   6322篇
  1970年   5908篇
  1969年   5482篇
  1968年   5168篇
  1967年   4636篇
  1966年   3981篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
This study examined electromyogram (EMG) and skin conductance level (SCL) as mediators of neuropsychological test performance of alcoholics. Alcoholics and controls with high EMG performed less well than low EMG subjects on 12 measures of neuropsychological performance. For SCL, the alcoholics and controls in the Low Group did not differ from those in the High Group on any measure. Analyses that used information intake (Low EMG and High SCL) and rejection (High EMG and Low SCL) information postures (IPs) demonstrated that the intake group outperformed the rejection group on 10 neuropsychological measures. Subjects with intake IPs reported more stimulation, concentration, and interest during the tasks than did subjects with rejection IPs. Results suggest that IPs can be used to identify alcoholics with neuropsychological deficits.  相似文献   
62.
63.
64.
Fronto-ethmoidal mucocoeles: a histopathological analysis.   总被引:1,自引:0,他引:1  
From a series of 118 fronto-ethmoidal mucocoeles, 40 specimens have been submitted to detailed histological analysis. The frequency of each epithelial and sub-epithelial component is considered and reveals features which support a dynamic theory of bone resorption and formation rather than that of pressure erosion in the pathogenesis of mucocoeles.  相似文献   
65.
Facial reanimation after acoustic neuroma excision is currently accomplished using a variety of surgical techniques. A multi-institutional survey of patient perceptions of facial reanimation success was accomplished by mailing a questionnaire to 809 randomly selected members of the Acoustic Neuroma Association. Four hundred sixty patients who underwent 296 reanimation procedures responded. Facial to hypoglossal nerve anastomosis, tarsorrhaphy, and upper eyelid implants were most frequently performed. The patient's estimations of initial deficit, spontaneous recovery, and overall satisfaction with the reanimation procedures are discussed.  相似文献   
66.
Most authors consider the principal advantage of FG anastomoses (compared to microsurgical anastomoses) to be shorter operating time, reduced surgical trauma to oviduct stumps, and absence of tissue ischemia. These features promote reparative regeneration and decrease adhesion formation, resulting in complete recanalization of fallopian tubes. To date, the majority of work on FG is confined to the experimental development of surgical techniques. Investigations in reconstructive gynecological surgery are quite uncommon. The physical properties of FG and the positive results of available experimental studies suggest that further development of surgical techniques using FG in obstetrics and gynecology is worthwhile.  相似文献   
67.
68.
69.
70.
Background: The management and follow-up of asthma patients presenting at Accident and Emergency (A&E) departments have mostly been studied in children's hospitals or specialised teaching hospitals. Aims: To study the adequacy of assessment, treatment and follow-up of patients presenting at A&E departments in non-teaching hospitals. Methods: A twenty-five per cent sample of presentations to A&E departments in all public hospitals in the Illawarra for one year was selected for a case note audit. Information on demographics, assessment, management and referral was extracted from the A&E case notes and medical records of cases with documentation of a final diagnosis of asthma. Chi square and Fischer's Exact tests were used for comparisons among hospitals. Results: Of 359 presentations with a final diagnosis of asthma, 88% were self referred and only 5% were first presentations. Objective measures of airways obstruction was not documented in 34% of admissions and 48% of nonadmissions. There was no documented follow-up in 28% of cases. The assessment and management of asthma in A&E was significantly poorer in smaller hospitals. Conclusion: Evidence of high use of A&E as a primary care facility by asthma patients was found in the study. There is a need to implement protocols to optimise assessment and treatment of asthma in smaller hospitals. (Aust NZ J Med 1993; 23: 672–677.).  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