全文获取类型
收费全文 | 216242篇 |
免费 | 3990篇 |
国内免费 | 147篇 |
专业分类
耳鼻咽喉 | 1573篇 |
儿科学 | 7969篇 |
妇产科学 | 4135篇 |
基础医学 | 22167篇 |
口腔科学 | 2014篇 |
临床医学 | 18457篇 |
内科学 | 38616篇 |
皮肤病学 | 1356篇 |
神经病学 | 20548篇 |
特种医学 | 9641篇 |
外国民族医学 | 1篇 |
外科学 | 32057篇 |
综合类 | 3068篇 |
一般理论 | 42篇 |
预防医学 | 22858篇 |
眼科学 | 3578篇 |
药学 | 12334篇 |
中国医学 | 703篇 |
肿瘤学 | 19262篇 |
出版年
2023年 | 226篇 |
2022年 | 475篇 |
2021年 | 869篇 |
2020年 | 480篇 |
2019年 | 815篇 |
2018年 | 22708篇 |
2017年 | 17960篇 |
2016年 | 20180篇 |
2015年 | 1843篇 |
2014年 | 2060篇 |
2013年 | 2703篇 |
2012年 | 9843篇 |
2011年 | 23934篇 |
2010年 | 20245篇 |
2009年 | 12962篇 |
2008年 | 22116篇 |
2007年 | 24548篇 |
2006年 | 3613篇 |
2005年 | 5173篇 |
2004年 | 6303篇 |
2003年 | 7083篇 |
2002年 | 5039篇 |
2001年 | 639篇 |
2000年 | 672篇 |
1999年 | 529篇 |
1998年 | 677篇 |
1997年 | 616篇 |
1996年 | 463篇 |
1995年 | 456篇 |
1994年 | 360篇 |
1993年 | 352篇 |
1992年 | 247篇 |
1991年 | 286篇 |
1990年 | 307篇 |
1989年 | 253篇 |
1988年 | 243篇 |
1987年 | 193篇 |
1986年 | 156篇 |
1985年 | 187篇 |
1984年 | 212篇 |
1983年 | 205篇 |
1982年 | 261篇 |
1981年 | 177篇 |
1980年 | 224篇 |
1979年 | 112篇 |
1978年 | 118篇 |
1977年 | 115篇 |
1976年 | 96篇 |
1975年 | 78篇 |
1974年 | 98篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
81.
82.
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83.
84.
85.
Anna Krygowska-Wajs William P. Cheshire Zbigniew K. Wszolek Alicja Hubalewska-Dydejczyk Barbara Jasinska-Myga Matthew J. Farrer Marek Moskala Anna Sowa-Staszczak 《Parkinsonism & related disorders》2009,15(9):692-696
ObjectiveTo assess for the presence of gastric dysmotility in familial and sporadic Parkinson disease (PD).Methods10 subjects with familial Parkinson disease (fPD), 35 subjects with sporadic Parkinson disease (sPD), and 15 controls, all from academic tertiary care movement disorders centers, were studied. fPD was defined as the presence of at least 2 affected individuals within 2–3 consecutive generations in a family. Molecular genetic analysis has not revealed, thus far, any known genomic abnormality in these families. Gastric emptying was assessed by dynamic abdominal scintigraphy over 92 min following ingestion of a solid meal containing 99mTc-labeled colloid of 40 MBq activity. The main outcome measures were gastric emptying half-time and radiotracer activity over the gastric area at 46 and at 92 min.ResultsGastric emptying time was delayed in 60% of subjects with PD. In comparison to mean t1/2 of 38 ± 7 min in controls, mean t1/2 was 58 ± 25 min in fPD (p = 0.02) and 46 ± 25 min in sPD (p = 0.10). Both fPD and sPD groups included subjects with delayed gastric emptying at an early stage of disease.ConclusionsPatients with fPD showed significantly delayed gastric emptying in comparison to normal age-matched individuals. Further studies of gastrointestinal dysfunction in PD, particularly fPD, are warranted. 相似文献
86.
87.
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88.
Peter Angelos 《World journal of surgery》2009,33(4):609-611
89.
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
90.