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   4056114篇
  免费   291317篇
  国内免费   8321篇
耳鼻咽喉   58272篇
儿科学   128680篇
妇产科学   110305篇
基础医学   564162篇
口腔科学   120561篇
临床医学   361873篇
内科学   776164篇
皮肤病学   85609篇
神经病学   334275篇
特种医学   159536篇
外国民族医学   1499篇
外科学   610967篇
综合类   95552篇
现状与发展   7篇
一般理论   1695篇
预防医学   328135篇
眼科学   96302篇
药学   298424篇
  10篇
中国医学   8638篇
肿瘤学   215086篇
  2018年   59985篇
  2017年   46528篇
  2016年   52111篇
  2015年   40525篇
  2014年   57217篇
  2013年   86433篇
  2012年   120837篇
  2011年   139731篇
  2010年   87172篇
  2009年   77959篇
  2008年   130851篇
  2007年   141061篇
  2006年   122922篇
  2005年   121654篇
  2004年   118640篇
  2003年   115491篇
  2002年   110440篇
  2001年   172439篇
  2000年   178043篇
  1999年   150901篇
  1998年   44571篇
  1997年   40240篇
  1996年   39015篇
  1995年   37671篇
  1994年   35344篇
  1993年   32877篇
  1992年   120684篇
  1991年   117134篇
  1990年   113986篇
  1989年   110418篇
  1988年   102162篇
  1987年   100983篇
  1986年   96000篇
  1985年   92075篇
  1984年   69756篇
  1983年   59519篇
  1982年   36273篇
  1981年   32498篇
  1979年   66241篇
  1978年   47019篇
  1977年   40215篇
  1976年   37392篇
  1975年   40409篇
  1974年   49142篇
  1973年   47172篇
  1972年   44530篇
  1971年   41622篇
  1970年   39217篇
  1969年   36893篇
  1968年   33975篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
Preadmission testing programs have been developed to recognize and treat medical abnormalities prior to hospitalization, thus reducing preoperative hospital day costs. A preadmission testing program's objectives can be expanded by combining with a discharge planning program. The two programs combined can facilitate discharge planning and patient education prior to hospitalization and coordinate the nursing process. This article will discuss the purposes, organization, and benefits of a preadmission discharge planning program.  相似文献   
972.
Pyomyositis occurs infrequently in temperate climates. The fulminating peracute form caused by group A Streptococcus is exceedingly rare. We present two children with streptococcal pyomyositis. One child was admitted in septic shock and required intensive supportive care during the acute stage of his illness. Persistent swelling and tenderness of his left thigh presented a diagnostic problem, which was eventually resolved with the aid of computerized tomography. Despite appropriate antibiotic therapy from the onset of illness, surgical debridement of the affected muscle was necessary. The second child presented with pyomyositis of the left paravertebral muscles and signs of incipient shock but did well on antibiotic therapy alone.  相似文献   
973.
974.
We report a case of primary localized amyloidosis of the bladder treated successfully with transurethral resection and intravesical dimethyl sulfoxide instillation. Dimethyl sulfoxide bladder instillation is useful for the treatment of primary localized amyloidosis of the bladder.  相似文献   
975.
Horner's syndrome or oculosympathetic paralysis is not an uncommon finding in patients with head and neck neoplasms. While in most cases the syndrome is easily established at the bedside, it can be confirmed and topographically defined as a central, preganglionic, or postganglionic lesion through sequential pharmacologic testing. The importance of such localization lies in differentiating neoplasia vs. a benign condition as the cause of the syndrome. Such variants as congenital Horner's, an alternating Horner's, and a pseudo-Horner's syndrome are discussed in regard to their differential features.  相似文献   
976.
In vitro studies established that neither cloth nor disposable diapers demonstrably contributed to the growth of Escherichia coli, Proteus vulgaris, Staphylococcus aureus, or Candida albicans when urine was present as a growth medium. In a clinical study of 166 children, the microbial skin flora of children with atopic dermatitis was compared with the flora of children with normal skin to determine the influence of diaper type. No biologically significant differences were detected between groups wearing disposable or cloth diapers in terms of frequency of isolation or log mean recovery of selected skin flora. Repeated isolation of S. aureus correlated with atopic dermatitis. The log mean recovery of S. aureus was higher in the atopic groups. The effects of each diaper type on skin microflora were equivalent in the normal and atopic populations.  相似文献   
977.
978.
BACKGROUND: The role of atopy in the evolution to chronic obstructive disease remains controversial. AIM: We aimed to assess the association between individual sensitization to common allergens and lung function. METHOD: We analysed data from 12,687 subjects aged 20 to 44 years, from 34 centres in 15 countries participating in the European Community Respiratory Health Survey (ECRHS). Participants performed a blood test, lung function test, methacholine challenge, and answered an administered questionnaire. The relationships between specific IgE, FEV1 and FEV1/FVC ratio were assessed for each study centre stratified by sex, followed by random effects meta-analysis. RESULTS: Asthmatics sensitized to house dust mite had a lower FEV1 (-119 mL in women and -112 mL in men) and FEV1/FVC ratio (-1.95%, and -2.48%) than asthmatics without sensitization. Asthmatics sensitized to cat had a lower FEV1 (statistically significant for women only) and a lower FEV1/FVC ratio. Asthmatic women sensitized to grass had a lower FEV1 and a lower ratio, and those sensitized to Cladosporium had a lower FEV1. A weak association was found with sensitization to cat and to Cladosporium among non-asthmatic women, which disappeared after adjusting for BHR. CONCLUSION: We conclude that atopy was related to a lower lung function, which was only apparent among asthmatics. This relationship was explained by specific sensitization to cat and to house dust mite, the latter being homogeneous across areas.  相似文献   
979.
980.
A 28-year-old male patient diagnosed with Becker muscular dystrophy (BMD)-associated cardiomyopathy was successfully bridged to transplantation with the Cardiowest total artificial heart. Dramatic improvement of muscular functional status occurred following transplantation.  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