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   530193篇
  免费   27556篇
  国内免费   495篇
耳鼻咽喉   6681篇
儿科学   16931篇
妇产科学   12549篇
基础医学   92619篇
口腔科学   12348篇
临床医学   48503篇
内科学   95455篇
皮肤病学   11868篇
神经病学   34020篇
特种医学   19769篇
外国民族医学   53篇
外科学   78070篇
综合类   7610篇
现状与发展   2篇
一般理论   107篇
预防医学   38539篇
眼科学   11939篇
药学   41416篇
  1篇
中国医学   1126篇
肿瘤学   28638篇
  2021年   3893篇
  2018年   5734篇
  2017年   4128篇
  2016年   4870篇
  2015年   5360篇
  2014年   7119篇
  2013年   10504篇
  2012年   15581篇
  2011年   17398篇
  2010年   9956篇
  2009年   8824篇
  2008年   15714篇
  2007年   17449篇
  2006年   16942篇
  2005年   16265篇
  2004年   15887篇
  2003年   15268篇
  2002年   14784篇
  2001年   22432篇
  2000年   22973篇
  1999年   18920篇
  1998年   5232篇
  1997年   4367篇
  1996年   4397篇
  1995年   4124篇
  1992年   14413篇
  1991年   15821篇
  1990年   15950篇
  1989年   15628篇
  1988年   14308篇
  1987年   14199篇
  1986年   13169篇
  1985年   12686篇
  1984年   9394篇
  1983年   8001篇
  1982年   4178篇
  1979年   8938篇
  1978年   6382篇
  1977年   5150篇
  1976年   5505篇
  1975年   6614篇
  1974年   7422篇
  1973年   7159篇
  1972年   6602篇
  1971年   6309篇
  1970年   5888篇
  1969年   5467篇
  1968年   5161篇
  1967年   4622篇
  1966年   3964篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
OBJECTIVE: This study was conducted to compare an otolaryngologist's experience with a cohort of epilepsy patients implanted with a vagal nerve stimulator (VNS) to previously published data. METHODS: Demographics, preoperative seizure frequency, medications, and complications were retrospectively collected from patients implanted by the senior author. Postoperative medications and seizure frequency were obtained from referring neurologists. RESULTS: Seventeen patients were implanted over a 24-month period. Average age was 28.3 years. Patients presented with petit mal (n = 3), tonic-clonic (n = 6), complex partial (n = 5), and grand mal (n = 8) seizures. Mean follow-up postimplantation was 13.5 months. Most patients had at least a 50% reduction of seizure frequency, with 3 patients being seizure free. There were no postoperative infections. One patient had left vocal cord immobility. The most common side effect was voice disturbance during device activation. CONCLUSION: Otolaryngologists are well equipped to perform VNS implantation and to diagnose and treat possible laryngeal side effects. EBM rating: C-4.  相似文献   
84.
A rapid procedure for determining angiotensin II in the blood by inverse voltammetry using a TA-2 device (Tekhnoanalit Company, Tomsk) with a graphite electrode has been developed. The results of analyses using the proposed technique agree with the clinical data. The rapid analytical procedure favors optimization of cardiotropic drug therapy. __________ Translated from Khimiko-Farmatsevticheskii Zhurnal, Vol. 40, No. 12, pp. 54–56, December, 2006.  相似文献   
85.
86.
87.
The purposes of this study were to examine how hospital patients' backgrounds and clinical illness are related to their perceptions of the individualized care they receive and to test the sensitivity of the Individualized Care Scale (ICS). Cross-sectional explorative survey data were obtained using questionnaires completed by 861 (response rate = 88%) predischarge hospital patients from six hospitals in Southern Finland in 2004. Self-administered questionnaires included the ICS as well as the 15D, a measure of health-related quality of life, and gathered information about the patients' backgrounds. Based on association tests, younger age, poorer state of health, and higher level of education were associated with more critical perceptions of individualized care. Using simultaneous regression analysis and presenting the results from stronger to weaker, we found age to be the strongest predictor of patients' positive perceptions of the individualized care they received. This was followed by health-related quality of life (HRQoL) as measured by the 15D, vocational education, and type of admission. The ICS was found to be a valid tool for the measurement of individualized care in hospitals. The self-reported patient data from this survey suggest that some patient characteristics are associated with the patients' perceptions about the individualized care they receive. There is now a need to consider how these characteristics can be taken into account in nursing care delivery to increase individualized care for hospital patients. The results also support use of the ICS in the measurement of individualized care in hospitals.  相似文献   
88.
Conclusions Limitation of this analysis is participation of limited centers. Though all the regions of the country are represented total number of procedures reported are less. Isolated CABG is commonest procedure performed in 2004. Congenital surgical procedures are more than the valvular heart disease procedure. For appropriate categorization we need standard nomenclature for various congenital surgical procedures.  相似文献   
89.
90.
Eighty-nine first-degree relatives of 22 patients with an established diagnosis of hypertrophic cardiomyopathy underwent electrocardiographic and echocardiographic screening. Scalar electrocardiogram was abnormal in 30/89 (33.7%) relatives. Of these thirty, eleven had definite evidence of hypertrophic cardiomyopathy at echo; one had borderline hypertrophy and was considered neither affected nor unaffected; four had questionable signs of hypertrophy. The remaining 14 relatives had normal echo-cardiograms. Fifty-nine relatives (66.3%) had normal electrocardiograms; at echo 3 were considered to have borderline hypertrophy, 16 had questionable signs of hypertrophy and 40 were normal. In relatives of patients with hypertrophic cardiomyopathy an abnormal electrocardiogram may reflect different morphologic conditions: a real hypertrophic cardiomyopathy or a myocardial hypertrophy of uncertain significance. Furthermore, in these categories of subjects, an abnormal electrocardiogram with normal echo must be considered with caution.  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