全文获取类型
收费全文 | 26388篇 |
免费 | 1321篇 |
国内免费 | 68篇 |
专业分类
耳鼻咽喉 | 366篇 |
儿科学 | 2073篇 |
妇产科学 | 613篇 |
基础医学 | 2999篇 |
口腔科学 | 470篇 |
临床医学 | 1433篇 |
内科学 | 4841篇 |
皮肤病学 | 1014篇 |
神经病学 | 1141篇 |
特种医学 | 999篇 |
外科学 | 3932篇 |
综合类 | 1160篇 |
一般理论 | 10篇 |
预防医学 | 1284篇 |
眼科学 | 1313篇 |
药学 | 2116篇 |
1篇 | |
中国医学 | 140篇 |
肿瘤学 | 1872篇 |
出版年
2023年 | 146篇 |
2022年 | 380篇 |
2021年 | 731篇 |
2020年 | 411篇 |
2019年 | 473篇 |
2018年 | 687篇 |
2017年 | 450篇 |
2016年 | 659篇 |
2015年 | 600篇 |
2014年 | 927篇 |
2013年 | 1095篇 |
2012年 | 1532篇 |
2011年 | 1635篇 |
2010年 | 931篇 |
2009年 | 747篇 |
2008年 | 1265篇 |
2007年 | 1334篇 |
2006年 | 1163篇 |
2005年 | 1083篇 |
2004年 | 994篇 |
2003年 | 899篇 |
2002年 | 816篇 |
2001年 | 743篇 |
2000年 | 700篇 |
1999年 | 614篇 |
1998年 | 270篇 |
1997年 | 209篇 |
1996年 | 172篇 |
1995年 | 152篇 |
1994年 | 135篇 |
1993年 | 137篇 |
1992年 | 363篇 |
1991年 | 391篇 |
1990年 | 343篇 |
1989年 | 363篇 |
1988年 | 314篇 |
1987年 | 282篇 |
1986年 | 274篇 |
1985年 | 284篇 |
1984年 | 222篇 |
1983年 | 182篇 |
1979年 | 242篇 |
1978年 | 163篇 |
1977年 | 150篇 |
1976年 | 139篇 |
1975年 | 163篇 |
1974年 | 155篇 |
1973年 | 177篇 |
1972年 | 139篇 |
1971年 | 122篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
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
13.
14.
R. Das Gupta P. P. Chakravorty A. Kaviraj 《Bulletin of environmental contamination and toxicology》2010,85(1):83-86
The 96 h LC50 values of six insecticides were determined on a non-target epigeic earthworm Perionyx excavatus under laboratory conditions. Cypermethrin was found most toxic to P. excavatus (LC50-0.008 mg/kg), followed by endosulfan (LC50-0.03 mg/kg), carbaryl (LC50-6.07 mg/kg), chlorpyrifos (LC50-7.3 mg/kg), aldicarb (LC50-10.63 mg/kg) and monocrotophos (LC50-13.04 mg/kg). When these LC50 values were compared with their respective recommended agricultural doses, aldicarb and carbaryl appeared more dangerous
than other pesticides because of their lower LC50 values than their respective recommended agricultural dose. Mean lethal time to cause 50% mortality at recommended agricultural
dose (LT50) also indicated that aldicarb achieved the fastest LT50 (26 h) followed by endosulfan (38 h) and carbaryl (44 h) indicating the danger of these pesticides to P. excavatus. 相似文献
15.
16.
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
17.
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
18.
19.
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
20.
Akshay Pratap Devendra Kumar Gupta Chandra Shekhar Agrawal Rakesh Kumar Pandit Shailesh Adhikary Anand Kumar Awadhesh Tiwari Satyendra Narayan Singh 《International journal of urology》2007,14(3):198-202
OBJECTIVES: We analyzed the methods and outcomes of urethroplasty in men with complex urethral disruptions. METHODS: The medical records of 40 men with complex urethral disruptions were analyzed. Surgical methods were individualized according to stricture location, severity and length of the stricture, bladder neck characteristics and presence of complicating factors. Patients were divided into four groups based on the above characteristics. RESULTS: End-to-end urethroplasty performed in six patients with short bulbar strictures (<3 cm) was successful in all. Elaborated perineal repair was performed in 10 patients with intermediate (3-6 cm) strictures with or without complicating factors. Elaborated perineal repair with urethral substitution was performed in nine patients with long segment stricture (>6 cm). Abdominal transpubic repair was successfully applied to patients with rectourethral fistula or lacerated bladder neck. Success rate of anastomotic urethroplasty was 95% while over all success rate was 85%. CONCLUSION: Guidelines for urethral reconstruction of complex urethral disruptions are predicated on stricture length, location, bladder neck characteristics and associated complicating factors. End-to-end urethroplasty with stricture excision is highly reliable for short strictures for which previous operative repair have failed. Elaborated perineal repair is extremely versatile for intermediate and longer strictures with associated complicating factors. Abdominal transpubic urethroplasty is effective for patients with rectourethral fistula or lacerated bladder neck. 相似文献