全文获取类型
收费全文 | 194320篇 |
免费 | 2031篇 |
国内免费 | 91篇 |
专业分类
耳鼻咽喉 | 1361篇 |
儿科学 | 7059篇 |
妇产科学 | 3365篇 |
基础医学 | 18897篇 |
口腔科学 | 2638篇 |
临床医学 | 13682篇 |
内科学 | 35529篇 |
皮肤病学 | 1044篇 |
神经病学 | 18092篇 |
特种医学 | 9244篇 |
外科学 | 31791篇 |
综合类 | 2510篇 |
一般理论 | 7篇 |
预防医学 | 19572篇 |
眼科学 | 3169篇 |
药学 | 10533篇 |
中国医学 | 714篇 |
肿瘤学 | 17235篇 |
出版年
2023年 | 137篇 |
2022年 | 283篇 |
2021年 | 708篇 |
2020年 | 372篇 |
2019年 | 587篇 |
2018年 | 22536篇 |
2017年 | 17740篇 |
2016年 | 19888篇 |
2015年 | 1469篇 |
2014年 | 1634篇 |
2013年 | 1757篇 |
2012年 | 8562篇 |
2011年 | 22556篇 |
2010年 | 19657篇 |
2009年 | 12295篇 |
2008年 | 20802篇 |
2007年 | 23039篇 |
2006年 | 1780篇 |
2005年 | 3353篇 |
2004年 | 4379篇 |
2003年 | 5176篇 |
2002年 | 3320篇 |
2001年 | 408篇 |
2000年 | 499篇 |
1999年 | 289篇 |
1998年 | 381篇 |
1997年 | 332篇 |
1996年 | 178篇 |
1995年 | 179篇 |
1994年 | 178篇 |
1993年 | 120篇 |
1992年 | 114篇 |
1991年 | 142篇 |
1990年 | 179篇 |
1989年 | 126篇 |
1988年 | 98篇 |
1987年 | 79篇 |
1986年 | 60篇 |
1985年 | 66篇 |
1984年 | 62篇 |
1983年 | 60篇 |
1982年 | 68篇 |
1981年 | 36篇 |
1980年 | 60篇 |
1978年 | 36篇 |
1977年 | 33篇 |
1938年 | 61篇 |
1934年 | 30篇 |
1932年 | 57篇 |
1930年 | 46篇 |
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
51.
Pilar Nicolás 《Hereditary cancer in clinical practice》2007,5(3):144-152
The specific characteristics of genetic data lead to ethical-legal conflicts in the framework of genetic diagnosis. Several international organisations, including UNESCO and the Council of Europe, have enacted rules referring to the use of genetic information. This paper discusses possible legal and ethical criteria that could be used in genetic testing. 相似文献
52.
53.
Sergio Barroilhet Adrián Cano-Prous Salvador Cervera-Enguix Maria João Forjaz Francisco Guillén-Grima 《Social psychiatry and psychiatric epidemiology》2009,44(12):1051-1065
Introduction
This paper presents the results of a study on the psychometric properties of an authorized Spanish version of the McMaster Family Assessment Device, a self-report measure of family functioning. 相似文献54.
55.
56.
Introduction
Although ependymoma is the third most common pediatric brain tumor, we know little about the genetic/epigenetic basis of its initiation, maintenance, or progression. This is due in part to the heterogeneity of the disease, as well as the small sample size of the cohorts analyzed in most studies. 相似文献57.
Peter Angelos 《World journal of surgery》2009,33(4):609-611
58.
Kentaroh Miyoshi Minoru Naito Tsuyoshi Ueno Shinji Hato Hideo Ino 《General thoracic and cardiovascular surgery》2009,57(11):629-632
A benign esophageal leiomyoma with abnormally increased fluorine-18-fluorodeoxyglucose uptake on positron emission tomography
(PET) was resected thoracoscopically. The tumor, of which the maximum standardized uptake value of the lesion was 4.7, was
well defined and 38 mm in diameter. Neither mitotic activity nor degeneration was found histologically; and immunoreactivity
for CD34, CD117, MIB-1, and glucose transporter-1 was negative immunohistochemically. A diagnosis of gastrointestinal stromal
tumor was ruled out by an oncogenic kinase gene mutation study. This case cautions against PET-dependent evaluation for malignant
potential of esophageal submucosal tumors. 相似文献
59.
60.
Marta Méndez-López Magdalena Méndez Fernando Sánchez-Patán Isabel Casado Maria-Angeles Aller Laudino López Maria-Teresa Corcuera Maria-Jose Alonso Maria-Paz Nava Jaime Arias Jorge-Luis Arias 《Journal of gastrointestinal surgery》2007,11(2):187-194
To obtain a new model of chronic portal hypertension in the rat, two classical methods to produce portal hypertension, partial portal vein ligation and the oral administration of thioacetamide (TAA), have been combined. Male Wistar rats were divided into four groups: 1 (control; n?=?10), 2 [triple partial portal vein ligation (TPVL); n?=?9], 3 (TAA; n?=?11), and 4 (TPVL plus TAA; n?=?9). After 3 months, portal pressure, types of portosystemic collateral circulation, laboratory hepatic function tests (aspartate aminotransferase, alanine aminotransferase, bilirubin, alkaline phosphatase, and gamma-glutamyl transpeptidase) and liver histology were studied. The animals belonging to group 2 (TPVL) developed extrahepatic portosystemic collateral circulation, associated with mesenteric venous vasculopathy without hepatic destructurization or portal hypertension. Animals from group 3 (TAA) developed cirrhosis and portal hypertension but not extrahepatic portosystemic collateral circulation, or mesenteric venous vasculopathy. Finally, the animals from group 4 (TPVL?+?TAA) developed cirrhosis, portal hypertension, portosystemic collateral circulation, and mesenteric venous vasculopathy. The association of TPVL and TAA can be used to obtain a model of chronic portal hypertension in the rat that includes all the alterations that patients with hepatic cirrhosis usually have. This could, therefore, prove to be a useful tool to study the pathophysiological mechanisms involved in these alterations. 相似文献