全文获取类型
收费全文 | 28359篇 |
免费 | 1401篇 |
国内免费 | 74篇 |
专业分类
耳鼻咽喉 | 378篇 |
儿科学 | 2138篇 |
妇产科学 | 642篇 |
基础医学 | 3162篇 |
口腔科学 | 476篇 |
临床医学 | 1598篇 |
内科学 | 5491篇 |
皮肤病学 | 1026篇 |
神经病学 | 1291篇 |
特种医学 | 1008篇 |
外科学 | 4468篇 |
综合类 | 979篇 |
一般理论 | 10篇 |
预防医学 | 1332篇 |
眼科学 | 1443篇 |
药学 | 2279篇 |
中国医学 | 150篇 |
肿瘤学 | 1963篇 |
出版年
2023年 | 164篇 |
2022年 | 417篇 |
2021年 | 828篇 |
2020年 | 458篇 |
2019年 | 536篇 |
2018年 | 745篇 |
2017年 | 498篇 |
2016年 | 730篇 |
2015年 | 662篇 |
2014年 | 1018篇 |
2013年 | 1206篇 |
2012年 | 1717篇 |
2011年 | 1839篇 |
2010年 | 1016篇 |
2009年 | 814篇 |
2008年 | 1419篇 |
2007年 | 1505篇 |
2006年 | 1289篇 |
2005年 | 1215篇 |
2004年 | 1108篇 |
2003年 | 1020篇 |
2002年 | 918篇 |
2001年 | 733篇 |
2000年 | 696篇 |
1999年 | 609篇 |
1998年 | 268篇 |
1997年 | 193篇 |
1996年 | 152篇 |
1995年 | 146篇 |
1994年 | 124篇 |
1993年 | 137篇 |
1992年 | 357篇 |
1991年 | 394篇 |
1990年 | 348篇 |
1989年 | 360篇 |
1988年 | 309篇 |
1987年 | 277篇 |
1986年 | 270篇 |
1985年 | 280篇 |
1984年 | 224篇 |
1983年 | 187篇 |
1979年 | 241篇 |
1978年 | 158篇 |
1977年 | 148篇 |
1976年 | 135篇 |
1975年 | 163篇 |
1974年 | 154篇 |
1973年 | 176篇 |
1972年 | 138篇 |
1971年 | 122篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Nand L. Sharma Vikram K. Mahajan Neelam Gupta Nitin Ranjan and Anju Lath 《Journal of cutaneous pathology》2009,36(4):486-492
Ehlers-Danlos syndrome – vascular type, the only lethal form, is rarely reported in dermatology literature. It is characterized by translucent, atrophic skin, easy bruising, arterial, intestinal and/or uterine fragility manifesting as varicose veins, aneurysms and vascular/visceral/uterine rupture. As its dermatopathologic features are not well elucidated, diagnosis is often made after a catastrophic complication or at autopsy. This 36 year-old non-consanguineous male had brown-black plaques with atrophy and frequent ulceration over legs and dorsal feet and tortuous varicose veins around ankles for the past 15 years. Perivenous skin was translucent and hypopigmented. He had multiple and ecchymotic keloids and small atrophic, pityriasis versicolor-like lesions over trunk. He did not have hypermobile/hyperextensible skin and joints and showed no systemic or investigative abnormality. Histopathologic features of atrophic lesion included blood extravasation in atrophic epidermis/dermis, focal clustering and dilatation of blood vessels, malformed vessel walls, abundant hemosiderin in the dermis and homogenously stained/whorled patterned collagen especially around blood vessels. Pathology of keloidal lesion showed new collagen and vascular fragility. These histopathologic features appear of diagnostic value especially in patients who have compatible clinical findings but cannot afford confirmation by biochemical testing for abnormal synthesis of type III procollagen or identification of mutations in the COL3A1 gene. 相似文献
12.
13.
The abdominal compartment syndrome is a life threatening condition resulting from pathologic elevation of the intraabdominal pressure. Prompt diagnosis is required to avoid significant sequelae. Diagnosis of this syndrome is based on clinical findings and intra abdominal pressure monitoring. Treatment consists of decompressive laparotomy, which corrects the pathology. Various surgical techniques are described to manage the open abdomen. Despite considerable attention accorded to this disorder, it is still associated with high morbidity and mortality. This review article deals with the identification of risk factors, pathophysiology, diagnostic criteria and treatment of critically ill patients with the abdominal compartment syndrome. 相似文献
14.
15.
16.
17.
Infections caused by extended-spectrum beta-lactamase (ESBL)-producing pathogens, particularly Klebsiella pneumoniae, are increasing. The epidemiology of ESBL-producing K. pneumoniae, the mechanisms of resistance, and treatment strategies for infections caused by these organisms are reviewed. 相似文献
18.
B. S. Sharma Sumit Sinha V. S. Mehta A. Suri Aditya Gupta A. K. Mahapatra 《Child's nervous system》2007,23(3):327-333
Object Intracranial aneurysms are rare in children and have different epidemiological, clinical, and morphological characteristics
and outcome from those in adults.
Materials and methods We analyzed demographic, clinical, radiologic features, treatment, and outcome in 55 patients <18 years of age, treated from
Jan 1995 through December 2005.
Results Intracranial aneurysms in children below 18 years constituted 4% of all intracranial aneurysms. Internal Carotid artery (ICA)
bifurcation was the commonest location. About half of the aneurysms were complex. Three-fourth of the patients required surgical
treatment. Two patients died, constituting 5% mortality. Two patients (5%) had poor outcome, whereas the majority (90%) had
a favorable outcome.
Conclusions Pediatric aneurysms have male predominance, higher incidence of clinical features of mass effect or seizures, high incidence
of large, traumatic/mycotic aneurysms, associated illnesses and ICH/IVH and hydrocephalus, better Hunt and Hess grades at
presentation, ICA bifurcation as the commonest site, and better outcome than their adult counterparts. 相似文献
19.
20.
Pratipal Singh Vivek Vijjan Manu Gupta Deepak Dubey Aneesh Srivastava 《International journal of urology》2007,14(6):558-560
Congenital thoracic ectopic kidney is a very rare developmental anomaly and the rarest form of all ectopic kidneys. It is usually asymptomatic and discovered incidentally on routine chest radiography. Herein we reported the first case of staghorn stone in a thoracic kidney managed successfully by percutaneous nephrolithotomy. 相似文献