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   36180篇
  免费   2675篇
  国内免费   316篇
耳鼻咽喉   553篇
儿科学   520篇
妇产科学   304篇
基础医学   2739篇
口腔科学   473篇
临床医学   1605篇
内科学   2182篇
皮肤病学   446篇
神经病学   2160篇
特种医学   759篇
外国民族医学   1篇
外科学   1818篇
综合类   1115篇
现状与发展   4篇
一般理论   1篇
预防医学   580篇
眼科学   22164篇
药学   971篇
  2篇
中国医学   52篇
肿瘤学   722篇
  2023年   1263篇
  2022年   2644篇
  2021年   2857篇
  2020年   2294篇
  2019年   1762篇
  2018年   2136篇
  2017年   1784篇
  2016年   1754篇
  2015年   1972篇
  2014年   3250篇
  2013年   3399篇
  2012年   1464篇
  2011年   1029篇
  2010年   1943篇
  2009年   1510篇
  2008年   681篇
  2007年   734篇
  2006年   536篇
  2005年   422篇
  2004年   312篇
  2003年   344篇
  2002年   339篇
  2001年   394篇
  2000年   271篇
  1999年   425篇
  1998年   261篇
  1997年   294篇
  1996年   291篇
  1995年   281篇
  1994年   157篇
  1993年   139篇
  1992年   91篇
  1991年   87篇
  1990年   60篇
  1989年   72篇
  1988年   111篇
  1987年   58篇
  1985年   101篇
  1984年   196篇
  1983年   253篇
  1982年   182篇
  1981年   179篇
  1980年   140篇
  1979年   147篇
  1978年   138篇
  1977年   42篇
  1976年   75篇
  1975年   73篇
  1974年   65篇
  1973年   51篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Purpose: To review the systemic and ocular manifestations of specific emergent viral infectious diseases relevant to the ophthalmologist with particular emphasis on anterior uveitis

Methods: Review of literature.

Results: Arboviral diseases are among the most important emergent and resurgent human infections, occurring mostly in tropical and subtropical zones, but appearing in virtually all regions of the world as a result of climate change, travel, and globalization. Arboviral infections are transmitted to humans by the bite of hematophagous arthropods, mainly mosquitoes. Systemic disease may range from asymptomatic to life-threatening. A wide variety of ocular manifestations, including uveitis, has been reported in association with these emerging viral diseases. Numerous viruses other than arboviruses also have been recently recognized as a potential cause of uveitis.

Conclusions: Proper clinical diagnosis of any emerging infectious disease is based on epidemiological data, history, systemic symptoms and signs, and the pattern of ocular involvement. The diagnosis is usually confirmed by detection of virus-specific DNA or antivirus antibodies in serum.  相似文献   
63.
ABSTRACT

Purpose

Work-related eye injuries have been reported with a variety of epidemiologic and clinical characteristics. We aimed to identify epidemiologic characteristics of work-related eye injuries and risk factors associated with severe injury in a large metropolitan city.  相似文献   
64.
65.
66.
67.
BackgroundThe collagen type IV alpha 1 chain (COL4A1) is an essential component of the basement membrane in small vessels. Pathogenic variants in COL4A1 cause perinatal cerebral hemorrhages in an autosomal-dominant fashion. However, little is known about the long-term outcomes of patients with mildly affecting COL4A1 mutations.Case reportWe report a 17-year-old boy, who presented with recurrent intracranial hemorrhages in the periventricular white matter. He had been followed-up as a child with cerebral palsy bearing intracranial calcifications, developmental delay and epilepsy. Screening tests in infancy provided negative results for intrauterine infections. Severe motor and cognitive deficits persisted after admission. Carbazochrome was introduced on day 19 of admission, which appeared to prevent extension and reactivation of cerebral hemorrhages for over 6 months after discharge.ResultsTargeted sequencing of NOTCH3 and TREX1 excluded causal mutations in these genes. The whole-exome sequencing revealed that he carried a de novo mutation in COL4A1 (p.Gly696Ser). An overview of the literature for 345 cases with COL4A1 mutations supported evidence that p.Gly696Ser is associated with the unique phenotype of late-onset hemorrhage among patients with COL4A1-associated cerebral angiopathy.ConclusionsThis case first demonstrates that infants with COL4A1-associated leukoencephalopathy and calcifications have a risk for developing the rupture of small vessels in the cerebral white matter after 10 years of age.  相似文献   
68.
69.
Graefe's Archive for Clinical and Experimental Ophthalmology - To evaluate the long-term safety and efficacy of intrastromal bevacizumab for treatment of deep corneal neovascularization in...  相似文献   
70.
ABSTRACT

Purpose

To investigate the expression of IL-11 and its receptor IL-11Rα and to quantify density of CD163+ M2 macrophages in proliferative diabetic retinopathy (PDR).  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