全文获取类型
收费全文 | 17640篇 |
免费 | 939篇 |
国内免费 | 53篇 |
专业分类
耳鼻咽喉 | 202篇 |
儿科学 | 968篇 |
妇产科学 | 355篇 |
基础医学 | 1907篇 |
口腔科学 | 311篇 |
临床医学 | 1212篇 |
内科学 | 3631篇 |
皮肤病学 | 418篇 |
神经病学 | 1093篇 |
特种医学 | 602篇 |
外国民族医学 | 1篇 |
外科学 | 2739篇 |
综合类 | 389篇 |
一般理论 | 15篇 |
预防医学 | 838篇 |
眼科学 | 781篇 |
药学 | 1683篇 |
中国医学 | 80篇 |
肿瘤学 | 1407篇 |
出版年
2023年 | 122篇 |
2022年 | 296篇 |
2021年 | 574篇 |
2020年 | 305篇 |
2019年 | 452篇 |
2018年 | 514篇 |
2017年 | 404篇 |
2016年 | 496篇 |
2015年 | 479篇 |
2014年 | 702篇 |
2013年 | 902篇 |
2012年 | 1313篇 |
2011年 | 1413篇 |
2010年 | 773篇 |
2009年 | 623篇 |
2008年 | 990篇 |
2007年 | 993篇 |
2006年 | 856篇 |
2005年 | 796篇 |
2004年 | 740篇 |
2003年 | 695篇 |
2002年 | 584篇 |
2001年 | 375篇 |
2000年 | 354篇 |
1999年 | 309篇 |
1998年 | 144篇 |
1997年 | 106篇 |
1996年 | 111篇 |
1995年 | 94篇 |
1994年 | 75篇 |
1993年 | 66篇 |
1992年 | 163篇 |
1991年 | 189篇 |
1990年 | 156篇 |
1989年 | 139篇 |
1988年 | 123篇 |
1987年 | 97篇 |
1986年 | 104篇 |
1985年 | 107篇 |
1984年 | 89篇 |
1983年 | 81篇 |
1979年 | 69篇 |
1978年 | 49篇 |
1977年 | 42篇 |
1975年 | 37篇 |
1973年 | 40篇 |
1972年 | 42篇 |
1971年 | 49篇 |
1969年 | 36篇 |
1968年 | 46篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
Subacute sclerosing panencephalitis (SSPE) is a rare, slowly progressing but invariably fatal disease that is related to a prior measles virus infection and most commonly affects paediatric patients. Magnetic resonance (MR) imaging is the modality of choice for determining such changes in white matter. SSPE typically demonstrates bilateral but asymmetric periventricular and subcortical white matter involvement. We herein report a rare case of unilateral white matter involvement in a 13-year-old boy with SSPE that closely simulated Rasmussen’s encephalitis. To the best of our knowledge, this is the first report of an atypical presentation on MR imaging in which SSPE was a rare cause of unilateral brain parenchymal involvement in a patient with intractable seizures. 相似文献
5.
6.
7.
8.
Advait Prakash Bhavesh Doshi Sangram Singh Tanmay Vyas Anvesh Jain 《African Journal of Paediatric Surgery》2015,12(1):82-85
Intussusception is a very rare cause of intestinal obstruction in neonates. It is of extremely rare occurrence among premature neonates. We present a case of 11-day-old premature neonate who presented with abdominal distension, intolerance to feeds, vomiting, significant bilious aspirate and bleeding per rectum. The initial diagnosis of necrotizing enterocolitis (NEC) led to a delay in the diagnosis. On exploratory laparotomy, it turned out to be a case of ileo-colic intussusception with Meckel''s diverticulum as a lead point. This site of intussusception (ileo-colic) and presence of a lead point among premature neonate is of exceedingly rare occurrence and very few such cases have been reported.In this article, the published work about clinical features and management on intussusceptions in premature neonates has been reviewed. The authors intend to highlight the difficulty in distinguishing the NEC and intussusception. Subtle clinical and radiological features which can help in differentiating the two conditions have been emphasized. This can avoid the delay in diagnosis and management which can prove critical. High index of suspicion with timely intervention is the key for optimizing outcome. A diagnosis of intussusception should always be considered in any preterm infant with suspected NEC. 相似文献
9.
10.
Andrea DiMartini Nancy Day Mary Amanda Dew Lubna Javed Mary Grace Fitzgerald Ashok Jain John J Fung Paulo Fontes 《Liver transplantation》2006,12(5):813-820
For patients who receive a liver transplant (LTX) for alcoholic liver disease (ALD), investigators are focusing beyond survival to determine specific alcohol use outcomes. Studies suggest the use of alcohol ranges from 8 to 22% for the first post-transplant year with cumulative rates reaching 30 to 40% by 5 years following transplantation. Yet while investigators are interested in determining specific rates of alcohol use and predictors of use, only three studies since 1990 have been prospective. In 1998, we began a prospective study of post-LTX alcohol consumption in ALD recipients using multiple repeated measures of alcohol use. After 5 years of follow-up, we found that 22% had used any alcohol by the first year and 42% had a drink by 5 years. By 5 years, 26% drank at a heavier use (binge) pattern and 20% drank in a frequent pattern. In a univariate model, predictors of alcohol use included pre-transplant length of sobriety, a diagnosis of alcohol dependence, a history of other substance use, and prior alcohol rehabilitation. 相似文献