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   245369篇
  免费   5965篇
  国内免费   181篇
耳鼻咽喉   1977篇
儿科学   8544篇
妇产科学   4697篇
基础医学   28408篇
口腔科学   3410篇
临床医学   18843篇
内科学   44884篇
皮肤病学   1904篇
神经病学   23277篇
特种医学   11719篇
外国民族医学   45篇
外科学   37464篇
综合类   2873篇
一般理论   89篇
预防医学   23236篇
眼科学   4052篇
药学   14426篇
中国医学   800篇
肿瘤学   20867篇
  2022年   600篇
  2021年   1257篇
  2020年   826篇
  2019年   1170篇
  2018年   23107篇
  2017年   18161篇
  2016年   20508篇
  2015年   2234篇
  2014年   2452篇
  2013年   3508篇
  2012年   10510篇
  2011年   24534篇
  2010年   21193篇
  2009年   13632篇
  2008年   22615篇
  2007年   24999篇
  2006年   3977篇
  2005年   5429篇
  2004年   6671篇
  2003年   7322篇
  2002年   5473篇
  2001年   2482篇
  2000年   2665篇
  1999年   2211篇
  1998年   1178篇
  1997年   993篇
  1996年   784篇
  1995年   814篇
  1994年   686篇
  1993年   693篇
  1992年   1496篇
  1991年   1491篇
  1990年   1469篇
  1989年   1408篇
  1988年   1156篇
  1987年   1145篇
  1986年   1077篇
  1985年   996篇
  1984年   713篇
  1983年   677篇
  1982年   485篇
  1981年   444篇
  1980年   420篇
  1979年   635篇
  1978年   386篇
  1977年   364篇
  1975年   382篇
  1974年   436篇
  1973年   353篇
  1972年   345篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.

Introduction  

This paper presents the results of a study on the psychometric properties of an authorized Spanish version of the McMaster Family Assessment Device, a self-report measure of family functioning.  相似文献   
53.
Capello  E.  Vuolo  L.  Gualandi  F.  Van Lint  M. T.  Roccatagliata  L.  Bonzano  L.  Pardini  M.  Uccelli  A.  Mancardi  Gianluigi 《Neurological sciences》2009,30(2):175-175
Autologous haematopoietic stem-cell transplantation has been evaluated over the last years as a possible new therapeutic strategy in severe forms of multiple sclerosis unresponsive to the approved therapies. Up to now, more than 400 patients have been treated and numerous are the phase I and phase II studies which addressed the feasibility of this treatment, the efficacy, side effects and transplant-related mortality. The clinical response is strongly related to the intensity of the conditioning regimen utilized as well as to the phase of the disease course in which the therapy is carried out. Rapidly evolving multiple sclerosis with a relapsing–remitting clinical course and MRI signs of activity are the cases that can take more advantage. The risk of mortality, which dropped in the last years to 2–3%, is still the main problem of this powerful therapy.  相似文献   
54.
55.
56.

Introduction  

Although ependymoma is the third most common pediatric brain tumor, we know little about the genetic/epigenetic basis of its initiation, maintenance, or progression. This is due in part to the heterogeneity of the disease, as well as the small sample size of the cohorts analyzed in most studies.  相似文献   
57.
58.
A benign esophageal leiomyoma with abnormally increased fluorine-18-fluorodeoxyglucose uptake on positron emission tomography (PET) was resected thoracoscopically. The tumor, of which the maximum standardized uptake value of the lesion was 4.7, was well defined and 38 mm in diameter. Neither mitotic activity nor degeneration was found histologically; and immunoreactivity for CD34, CD117, MIB-1, and glucose transporter-1 was negative immunohistochemically. A diagnosis of gastrointestinal stromal tumor was ruled out by an oncogenic kinase gene mutation study. This case cautions against PET-dependent evaluation for malignant potential of esophageal submucosal tumors.  相似文献   
59.
60.
The objective of this systematic review was to evaluate the impact of pharmacist delivered community-based services to optimise the use of medications for mental illness. Twenty-two controlled (randomised and non-randomised) studies of pharmacists' interventions in community and residential aged care settings identified in international scientific literature were included for review. Papers were assessed for study design, service recipient, country of origin, intervention type, number of participating pharmacists, methodological quality and outcome measurement. Three studies showed that pharmacists' medication counselling and treatment monitoring can improve adherence to antidepressant medications among those commencing treatment when calculated using an intention-to-treat analysis. Four trials demonstrated that pharmacist conducted medication reviews may reduce the number of potentially inappropriate medications prescribed to those at high risk of medication misadventure. The results of this review provide some evidence that pharmacists can contribute to optimising the use of medications for mental illness in the community setting. However, more well designed studies are needed to assess the impact of pharmacists as members of community mental health teams and as providers of comprehensive medicines information to people with schizophrenia and bipolar disorder  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