全文获取类型
收费全文 | 196169篇 |
免费 | 3334篇 |
国内免费 | 95篇 |
专业分类
耳鼻咽喉 | 1295篇 |
儿科学 | 7186篇 |
妇产科学 | 3369篇 |
基础医学 | 19299篇 |
口腔科学 | 2156篇 |
临床医学 | 14568篇 |
内科学 | 35093篇 |
皮肤病学 | 958篇 |
神经病学 | 18938篇 |
特种医学 | 9668篇 |
外科学 | 31703篇 |
综合类 | 2803篇 |
一般理论 | 34篇 |
预防医学 | 20133篇 |
眼科学 | 3212篇 |
药学 | 10889篇 |
1篇 | |
中国医学 | 663篇 |
肿瘤学 | 17630篇 |
出版年
2021年 | 271篇 |
2020年 | 189篇 |
2019年 | 350篇 |
2018年 | 22218篇 |
2017年 | 17617篇 |
2016年 | 19787篇 |
2015年 | 1228篇 |
2014年 | 1290篇 |
2013年 | 1455篇 |
2012年 | 7954篇 |
2011年 | 22118篇 |
2010年 | 19362篇 |
2009年 | 12029篇 |
2008年 | 20442篇 |
2007年 | 22687篇 |
2006年 | 1575篇 |
2005年 | 3197篇 |
2004年 | 4291篇 |
2003年 | 5287篇 |
2002年 | 3420篇 |
2001年 | 996篇 |
2000年 | 1189篇 |
1999年 | 787篇 |
1998年 | 480篇 |
1997年 | 478篇 |
1996年 | 366篇 |
1995年 | 300篇 |
1994年 | 305篇 |
1993年 | 258篇 |
1992年 | 492篇 |
1991年 | 514篇 |
1990年 | 582篇 |
1989年 | 432篇 |
1988年 | 448篇 |
1987年 | 404篇 |
1986年 | 337篇 |
1985年 | 351篇 |
1984年 | 272篇 |
1983年 | 242篇 |
1982年 | 219篇 |
1981年 | 175篇 |
1980年 | 208篇 |
1979年 | 232篇 |
1978年 | 174篇 |
1977年 | 158篇 |
1976年 | 146篇 |
1974年 | 184篇 |
1973年 | 148篇 |
1972年 | 136篇 |
1971年 | 132篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
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
22.
23.
Henry Cisneros 《AIDS and behavior》2007,11(2):7-8
For persons battling HIV/AIDS a stable place to live may decide the length and quality of life itself. It is nearly impossible for a person on the streets to engage in a needed continuous AIDS treatment regimen when the very basic question of where that person will rest his or her head when darkness comes in just a few hours is unresolved. When danger lurks on the streets, when cold numbs the limbs, when tiredness overwhelms the mind, when fear breaks the spirit, a place to call home would make all the difference. 相似文献
24.
Davies S. P.; Webb W. J. S.; Patou G.; Murray W. K.; Denning D. W. 《Nephrology, dialysis, transplantation》1987,2(6):568-572
The second documented case of renal aspergilloma due to Aspergillusflavus is presented. The merits of the medical therapy thatfailed are discussed. Pathological examination showed a nidusof aspergillus around suture material persisting from a pyelolithotomyoperation 2 years before in India. We argue that this was thereason for the failure of the medical therapy. This is the firstcase of its kind reported. 相似文献
25.
26.
27.
28.
Introduction Choroid plexus cysts can lead to isolation of the lateral ventricles and distension of the third ventricle. We present an
ultrasonographic video documentation of an infant with variably shaped and localized choroid plexus cyst of the third ventricle.
Case report An infant had periods of increased intracranial pressure with changing dilatation of the first to third ventricle. Cerebral
ultrasonography of the not crying boy demonstrated a choroid plexus cyst limply hanging down from the roof of the third ventricle
to the beginning of the aqueduct of Sylvius. During crying, the cyst prolapsed from the third into left lateral ventricle
and was strangled by the foramen of Monro. Endoscopic cyst fenestration and third ventriculostomy continuously solved the
problem of intermittent hydrocephalus occlusus.
Conclusion Depending not only on localization and size but also on cyst form and cerebrospinal fluid pressure, a single choroid plexus
cyst can cause various obstructions of cerebrospinal fluid pathways. 相似文献
29.
Background
Health service policy in the United Kingdom emphasises the importance of self-care by patients with chronic conditions. Written information for patients about their condition is seen as an important aid to help patients look after themselves. From a discourse analysis perspective written texts such as patient information leaflets do not simply describe the reality of a medical condition and its management but by drawing on some sorts of knowledge and evidence rather than others help construct the reality of that condition. This study explored patient information leaflets on osteoarthritis (OA) to see how OA was constructed and to consider the implications for self-care. 相似文献30.
Isolated pure dislocations of the fifth carpo-metacarpal joint are extremely rare injuries. The dorsal form was described
in mere 12 cases. The diagnosis can be easily missed. The lesion is also often overlooked in the routine diagnostic X-ray.
Lateral and oblique views are important for the recognition of the true extent of the lesion. Treatment of these injures is
still controversial and both closed reduction with percutaneous pinning or open reduction with internal fixation are advocated.
The goal of treatment is early reduction and fixation of the metacarpal. Early diagnosis is the key to success. The aim of
this paper is to review literature and present two new cases. 相似文献