全文获取类型
收费全文 | 2346569篇 |
免费 | 174830篇 |
国内免费 | 3319篇 |
专业分类
耳鼻咽喉 | 32051篇 |
儿科学 | 75891篇 |
妇产科学 | 62698篇 |
基础医学 | 348169篇 |
口腔科学 | 63620篇 |
临床医学 | 211340篇 |
内科学 | 457271篇 |
皮肤病学 | 51727篇 |
神经病学 | 185276篇 |
特种医学 | 88006篇 |
外国民族医学 | 489篇 |
外科学 | 353859篇 |
综合类 | 47509篇 |
现状与发展 | 12篇 |
一般理论 | 848篇 |
预防医学 | 182729篇 |
眼科学 | 54333篇 |
药学 | 175097篇 |
11篇 | |
中国医学 | 4575篇 |
肿瘤学 | 129207篇 |
出版年
2021年 | 18979篇 |
2019年 | 19537篇 |
2018年 | 27057篇 |
2017年 | 20357篇 |
2016年 | 22745篇 |
2015年 | 25638篇 |
2014年 | 36094篇 |
2013年 | 53954篇 |
2012年 | 74676篇 |
2011年 | 79405篇 |
2010年 | 47055篇 |
2009年 | 44564篇 |
2008年 | 74608篇 |
2007年 | 79476篇 |
2006年 | 80293篇 |
2005年 | 77777篇 |
2004年 | 74365篇 |
2003年 | 71690篇 |
2002年 | 69363篇 |
2001年 | 108739篇 |
2000年 | 111453篇 |
1999年 | 93496篇 |
1998年 | 26990篇 |
1997年 | 23658篇 |
1996年 | 24055篇 |
1995年 | 22716篇 |
1994年 | 20893篇 |
1993年 | 19714篇 |
1992年 | 72001篇 |
1991年 | 70069篇 |
1990年 | 68393篇 |
1989年 | 65667篇 |
1988年 | 60305篇 |
1987年 | 59126篇 |
1986年 | 55218篇 |
1985年 | 53005篇 |
1984年 | 39311篇 |
1983年 | 33397篇 |
1982年 | 19859篇 |
1979年 | 35868篇 |
1978年 | 25651篇 |
1977年 | 21232篇 |
1976年 | 20332篇 |
1975年 | 21816篇 |
1974年 | 26148篇 |
1973年 | 24803篇 |
1972年 | 23200篇 |
1971年 | 22037篇 |
1970年 | 20249篇 |
1969年 | 19315篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
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
74.
75.
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
76.
Fathi A Elshazly Walid K Abdelbasset Ragab K Elnaggar Sayed A Tantawy 《African health sciences》2020,20(1):368
BackgroundSecond-hand smoking or environmental tobacco smoke is a critical health risk. Children are the most vulnerable to second-hand smoking because of their small bronchial ducts, less developed immunity, and low-physical activity.ObjectivesThe purpose of this study was to ascertain the effects of second-hand smoking on lung functions in athlete and non-athlete school-aged children.MethodsThis observational study included forty-six school-aged children, their age was 8–15 years, assigned to three groups; 2 study groups and 1 control group (n=15). The study groups comprised of 16 football players, and of 15 cyclists. Lung functions were evaluated recording forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow using digital spirometer.ResultsAll measures were recorded in definite values and the children were also classified into second-hand smoking (SH), or non-exposed to tobacco smoking (NE). The findings presented a significant increase (p<0.05) of the study groups in forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow solely for the non-exposed children. However, there were non-significant differences between the cyclists and football players or between the passive smoking children and non-exposed children in any of the two study groups (p>0.05).ConclusionThe outcomes of this study suggest beneficial influences of the sports activity on the lung functions, without different influences of the cyclists and football players on the lung functions. 相似文献
77.
78.
79.
80.