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   1698731篇
  免费   115310篇
  国内免费   2934篇
耳鼻咽喉   23556篇
儿科学   50071篇
妇产科学   42924篇
基础医学   250786篇
口腔科学   51058篇
临床医学   145186篇
内科学   332583篇
皮肤病学   37889篇
神经病学   128028篇
特种医学   62042篇
外国民族医学   153篇
外科学   258312篇
综合类   32004篇
现状与发展   2篇
一般理论   422篇
预防医学   127922篇
眼科学   40336篇
药学   131374篇
  4篇
中国医学   4868篇
肿瘤学   97455篇
  2021年   13113篇
  2019年   13751篇
  2018年   21261篇
  2017年   15642篇
  2016年   16878篇
  2015年   19051篇
  2014年   24916篇
  2013年   37441篇
  2012年   52962篇
  2011年   55540篇
  2010年   31792篇
  2009年   28763篇
  2008年   51422篇
  2007年   54633篇
  2006年   55369篇
  2005年   52702篇
  2004年   50729篇
  2003年   48242篇
  2002年   47030篇
  2001年   87126篇
  2000年   89870篇
  1999年   74299篇
  1998年   18003篇
  1997年   15466篇
  1996年   15761篇
  1995年   14827篇
  1994年   13664篇
  1992年   55752篇
  1991年   54247篇
  1990年   52380篇
  1989年   51134篇
  1988年   46554篇
  1987年   45306篇
  1986年   42770篇
  1985年   40566篇
  1984年   29338篇
  1983年   24925篇
  1982年   13270篇
  1979年   26745篇
  1978年   18298篇
  1977年   15712篇
  1976年   14374篇
  1975年   15866篇
  1974年   19158篇
  1973年   18304篇
  1972年   17278篇
  1971年   16270篇
  1970年   15609篇
  1969年   14672篇
  1968年   13600篇
排序方式: 共有10000条查询结果,搜索用时 2 毫秒
1.
Quality of Life Research - The COVID-19 pandemic might add to the stressors experienced by people living with rheumatic diseases. This study aimed to examine rheumatic patients’ functional...  相似文献   
2.
Molnár  B.  Aroca  S.  Dobos  A.  Orbán  K.  Szabó  J.  Windisch  P.  Stähli  A.  Sculean  A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with...  相似文献   
3.

Interstitial lung disease (ILD) represents a significant cause of morbidity and mortality in systemic sclerosis (SSc). The purpose of this study was to examine recirculating lymphocytes from SSc patients for potential biomarkers of interstitial lung disease (ILD). Peripheral blood mononuclear cells (PBMCs) were isolated from patients with SSc and healthy controls enrolled in the Vanderbilt University Myositis and Scleroderma Treatment Initiative Center cohort between 9/2017–6/2019. Clinical phenotyping was performed by chart abstraction. Immunophenotyping was performed using both mass cytometry and fluorescence cytometry combined with t-distributed stochastic neighbor embedding analysis and traditional biaxial gating. This study included 34 patients with SSc-ILD, 14 patients without SSc-ILD, and 25 healthy controls. CD21lo/neg cells are significantly increased in SSc-ILD but not in SSc without ILD (15.4 ± 13.3% vs. 5.8 ± 0.9%, p = 0.002) or healthy controls (5.0 ± 0.5%, p < 0.0001). While CD21lo/neg B cells can be identified from a single biaxial gate, tSNE analysis reveals that the biaxial gate is comprised of multiple distinct subsets, all of which are increased in SSc-ILD. CD21lo/neg cells in both healthy controls and SSc-ILD are predominantly tBET positive and do not have intracellular CD21. Immunohistochemistry staining demonstrated that CD21lo/neg B cells diffusely infiltrate the lung parenchyma of an SSc-ILD patient. Additional work is needed to validate this biomarker in larger cohorts and longitudinal studies and to understand the role of these cells in SSc-ILD.

  相似文献   
4.
5.
6.
IntroductionHip displacement is common in cerebral palsy (CP) and is related to the severity of neurological and functional impairment. It is a silent, but progressive disease, and can result in significant morbidity and decreased quality of life, if left untreated. The pathophysiology of hip displacement in CP is a combination of hip flexor-adductor muscle spasticity, abductor muscle weakness, and delayed weight-bearing, resulting in proximal femoral deformities and progressive acetabular dysplasia. Due to a lack of symptoms in the early stages of hip displacement, the diagnosis is easily missed. Awareness of this condition and regular surveillance by clinical examination and serial radiographs of the hips are the key to early diagnosis and treatment.Hip surveillance programmesSeveral population-based studies from around the world have demonstrated that universal hip surveillance in children with CP allows early detection of hip displacement and appropriate early intervention, with a resultant decrease in painful dislocations. Global hip surveillance models are based upon the patients’ age, functional level determined by the Gross Motor Function Classification system (GMFCS), gait classification, standardized clinical exam, and radiographic indices such as the migration percentage (MP), as critical indicators of progressive hip displacement.ConclusionDespite 25 years of evidence showing the efficacy of established hip surveillance programmes, there is poor awareness among healthcare professionals in India about the importance of regular hip surveillance in children with CP. There is a need for professional organizations to develop evidence-based guidelines for hip surveillance which are relevant to the Indian context.  相似文献   
7.
8.
9.
10.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  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