全文获取类型
收费全文 | 3385506篇 |
免费 | 248712篇 |
国内免费 | 8563篇 |
专业分类
耳鼻咽喉 | 46924篇 |
儿科学 | 113310篇 |
妇产科学 | 93888篇 |
基础医学 | 477263篇 |
口腔科学 | 93838篇 |
临床医学 | 307585篇 |
内科学 | 664373篇 |
皮肤病学 | 79371篇 |
神经病学 | 276458篇 |
特种医学 | 131603篇 |
外国民族医学 | 1282篇 |
外科学 | 509445篇 |
综合类 | 69834篇 |
现状与发展 | 6篇 |
一般理论 | 1243篇 |
预防医学 | 259319篇 |
眼科学 | 76500篇 |
药学 | 249789篇 |
9篇 | |
中国医学 | 6845篇 |
肿瘤学 | 183896篇 |
出版年
2019年 | 26247篇 |
2018年 | 37365篇 |
2017年 | 28683篇 |
2016年 | 33002篇 |
2015年 | 36915篇 |
2014年 | 50792篇 |
2013年 | 76996篇 |
2012年 | 102906篇 |
2011年 | 109313篇 |
2010年 | 65731篇 |
2009年 | 62472篇 |
2008年 | 102663篇 |
2007年 | 109302篇 |
2006年 | 110611篇 |
2005年 | 106485篇 |
2004年 | 103075篇 |
2003年 | 99643篇 |
2002年 | 96481篇 |
2001年 | 162014篇 |
2000年 | 166761篇 |
1999年 | 140827篇 |
1998年 | 40488篇 |
1997年 | 36009篇 |
1996年 | 36149篇 |
1995年 | 34836篇 |
1994年 | 32285篇 |
1993年 | 30271篇 |
1992年 | 110220篇 |
1991年 | 106457篇 |
1990年 | 103398篇 |
1989年 | 99884篇 |
1988年 | 91646篇 |
1987年 | 89946篇 |
1986年 | 84162篇 |
1985年 | 80465篇 |
1984年 | 60251篇 |
1983年 | 50988篇 |
1982年 | 30054篇 |
1981年 | 27125篇 |
1979年 | 53461篇 |
1978年 | 37587篇 |
1977年 | 32083篇 |
1976年 | 29778篇 |
1975年 | 31798篇 |
1974年 | 37421篇 |
1973年 | 35636篇 |
1972年 | 33312篇 |
1971年 | 30689篇 |
1970年 | 28595篇 |
1969年 | 26960篇 |
排序方式: 共有10000条查询结果,搜索用时 468 毫秒
131.
132.
Amosova E. N. Shilova I. V. Zueva E. P. Rybalkina O. Yu. 《Pharmaceutical Chemistry Journal》2020,54(7):721-724
Pharmaceutical Chemistry Journal - Three extracts were produced from the above-ground part of the meadowsweet Filipendula ulmaria (L.) Maxim. using water, 40% ethanol, and 70% ethanol. Comparative... 相似文献
133.
134.
Recurrent Oral and Genital Ulcers in an Infant: Neonatal Presentation of Pediatric Behçet Disease
下载免费PDF全文
![点击此处可从《Pediatric dermatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Emma F. Johnson M.D. Danielle M. Hawkins M.D. Laura K. Gifford M.D. Aimee C. Smidt M.D. 《Pediatric dermatology》2015,32(5):714-717
Behçet disease is a complex, multisystem disease characterized by recurrent oral and genital ulcerations. It rarely occurs in infants or children. Neonatal Behçet disease has been reported in infants whose ulcers resolve at or before 9 weeks of age. Few cases of neonatal Behçet disease persisting into childhood have previously been reported. We report the case of a 1‐month‐old infant who presented with severe recurrent genital ulcerations and at 6 months developed recurrent oral ulcerations. Her orogenital ulcerations continue to recur. Human leukocyte antigen testing revealed HLA‐B51 and B44 positivity. This is a case of pediatric Behçet disease in the neonatal period. Behçet disease should be considered in the differential diagnosis of recurrent genital and oral ulcerations in infants and children. 相似文献
135.
Adel A. Mahmoud Tayseer Abdelmagid Mohammed AlGhofely Ahmed M. Hamed Roaa Al Sharif 《Neurosciences (Riyadh, Saudi Arabia)》2020,25(3):200
Objectives:To report if the association of epilepsy in pediatric patients (below the age of 15 years) with Insulin-dependent Diabetes (IDDM) at King Fahad Medical City (KFMC) is higher than the prevalence of epilepsy in the same age group (who have no IDDM) in our community. Consequently, we would determine if there is a relationship between the presence of epilepsy in diabetic children and the presence of positive antiGAD65 antibodies.Methods:This cohort study included 305 pediatric patients below the age of 15 years with Insulin-dependent Diabetes Mellitus (IDDM). They were randomly recruited at the Pediatric Endocrinology Clinic in KFMC. The patients’ caregivers were given a questionnaire between December 2015 till March 2019 to determine the seizure disorder history. There was also a retrospective review of 214 patients’ files for anti-GAD 65 positivity.Results:Our study found a significant relation between the presence of epilepsy in children with IDDM. Therefore, we could confirm the relationship between the existence of epilepsy in children with IDDM and having positive GAD65 antibodies.Conclusion:Our study supports the presence of consistent relation between having IDDM and having epilepsy in children and between the latter and the presence of positive GAD65 antibodies.Insulin dependent diabetes Mellitus (IDDM) is a common condition in children and adolescents worldwide and so is epilepsy.1,2 Recently, there were increasing reports suggesting a potential association between having IDDM and the occurrence of epilepsy.3 Their association might represent simply a chance to relate their underlying mechanisms. However, the cause-effect relationship is not fully well defined. Literature from other countries have shown the increased prevalence of seizure disorders in this group of patients.4,5 There are scarce studies in the literature investigating IDDM characteristics contributing to having epilepsy, including positive GAD 65 antibodies. In this study that ran in King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia (KSA) we are aiming to determine if the prevalence of epilepsy among 1DDM children under the age of 15 years (in our center) is higher than controls (same age without IDDM), and to check the positivity of anti-GAD 65 amongst those patients in order to find if there is a relationship between epilepsy in children with diabetes and the presence of positive GAD65 Antibodies. 相似文献
136.
137.
138.
Nevo N. Goldstein A. L. Staierman M. Eran N. Carmeli I. Rayman S. mnouskin Y. 《Hernia》2022,26(6):1491-1499
Hernia - The minimally invasive surgical repair of combined inguinal and ventral hernias often requires shifting from one approach or plane to another. The traditional enhanced-view totally... 相似文献
139.
140.
Koel Dutt P N Agarwal Rajdeep Singh Vikas Singh Tomar 《The Indian journal of surgery》2015,77(1):62-64
Haemophilia is a common cause of genetically inherited bleeding disorders. Pseudotumours occur in 1–2 % of persons with severe forms of haemophilia. These are a result of repeated haemorrhage into soft tissues, subperiosteum or a site of bone fracture with inadequate resorption of the extravasated blood. There are a number of therapeutic alternatives for this dangerous condition: surgical removal, percutaneous management, irradiation, embolization etc. In this case report, we describe the natural history, clinical course and successful surgical management of a patient with haemophilia who presented with a massive pseudotumour. We also briefly review the relevant literature on the various therapeutic modalities that have been implemented in the management of this rare complication. Though surgeons may be averse to operate on haemophiliacs, primary surgical management as done in our case may prove to be the definitive treatment option for such patients. 相似文献