全文获取类型
收费全文 | 2771篇 |
免费 | 103篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 58篇 |
儿科学 | 128篇 |
妇产科学 | 107篇 |
基础医学 | 201篇 |
口腔科学 | 146篇 |
临床医学 | 155篇 |
内科学 | 485篇 |
皮肤病学 | 91篇 |
神经病学 | 76篇 |
特种医学 | 212篇 |
外国民族医学 | 1篇 |
外科学 | 483篇 |
综合类 | 286篇 |
预防医学 | 71篇 |
眼科学 | 116篇 |
药学 | 148篇 |
中国医学 | 11篇 |
肿瘤学 | 113篇 |
出版年
2023年 | 19篇 |
2022年 | 29篇 |
2021年 | 53篇 |
2020年 | 39篇 |
2019年 | 49篇 |
2018年 | 68篇 |
2017年 | 71篇 |
2016年 | 57篇 |
2015年 | 90篇 |
2014年 | 82篇 |
2013年 | 107篇 |
2012年 | 165篇 |
2011年 | 172篇 |
2010年 | 137篇 |
2009年 | 121篇 |
2008年 | 141篇 |
2007年 | 213篇 |
2006年 | 193篇 |
2005年 | 180篇 |
2004年 | 170篇 |
2003年 | 124篇 |
2002年 | 113篇 |
2001年 | 31篇 |
2000年 | 25篇 |
1999年 | 34篇 |
1998年 | 44篇 |
1997年 | 57篇 |
1996年 | 60篇 |
1995年 | 36篇 |
1994年 | 30篇 |
1993年 | 9篇 |
1992年 | 11篇 |
1991年 | 9篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1988年 | 15篇 |
1987年 | 10篇 |
1986年 | 14篇 |
1985年 | 12篇 |
1984年 | 17篇 |
1983年 | 10篇 |
1982年 | 9篇 |
1981年 | 8篇 |
1980年 | 7篇 |
1979年 | 3篇 |
1978年 | 4篇 |
1977年 | 5篇 |
1976年 | 5篇 |
1975年 | 5篇 |
1969年 | 3篇 |
排序方式: 共有2888条查询结果,搜索用时 15 毫秒
1.
SK Raina 《Journal of postgraduate medicine》2015,61(3):213-Sep;61(3):213
2.
3.
4.
5.
OBJECTIVE: This study was conducted to compare an otolaryngologist's experience with a cohort of epilepsy patients implanted with a vagal nerve stimulator (VNS) to previously published data. METHODS: Demographics, preoperative seizure frequency, medications, and complications were retrospectively collected from patients implanted by the senior author. Postoperative medications and seizure frequency were obtained from referring neurologists. RESULTS: Seventeen patients were implanted over a 24-month period. Average age was 28.3 years. Patients presented with petit mal (n = 3), tonic-clonic (n = 6), complex partial (n = 5), and grand mal (n = 8) seizures. Mean follow-up postimplantation was 13.5 months. Most patients had at least a 50% reduction of seizure frequency, with 3 patients being seizure free. There were no postoperative infections. One patient had left vocal cord immobility. The most common side effect was voice disturbance during device activation. CONCLUSION: Otolaryngologists are well equipped to perform VNS implantation and to diagnose and treat possible laryngeal side effects. EBM rating: C-4. 相似文献
6.
Sonoelasticity imaging of prostate cancer: in vitro results 总被引:2,自引:0,他引:2
7.
Yelda Karincaoglu Kadir Batcioglu Tamer Erdem Muammer Esrefoglu Metin Genc 《Journal of oral pathology & medicine》2005,34(1):7-12
BACKGROUND: Despite plenty of research, the cause of recurrent aphthous stomatitis (RAS) remains obscure. It has been proposed that, the aetiological factors such as local trauma, smoking, vitamin deficiencies and viral infections lead to aphthae formation via final common pathway based on increased oxidative stress. The aim of this investigation was to evaluate the antioxidant enzyme superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSHPx) alterations in plasma and saliva, and in addition uric acid (UA) in saliva, in patients with RAS and healthy controls. METHODS: Thirty-two patients with RAS and 30 healthy controls were included into the study. The SOD, CAT, GSHPx and UA levels were measured in plasma and saliva in study and control groups. RESULTS: In the RAS group, although the mean SOD (P<0.001) and CAT (P<0.05) levels of plasma were lower, GSHPx (P<0.001) levels were higher than control group. The salivary concentrations of the SOD (P<0.001), CAT (P<0.05) and GSHPx (P<0.001) in RAS group were entirely opposite to plasma concentrations. UA were not significant between RAS group and controls. CONCLUSION: Since we found salivary SOD and CAT levels were high whereas plasma levels were low, it has been thought that, salivary defence mechanisms via antioxidant agents may be stimulated against to the ulcerous lesion. We consider that the organism might mobilize the antioxidant potential to the sites where they were needed. At this point, decrease of SOD and CAT levels in the plasma may be related to this shift. It is also thought that GSHPx secretion in the saliva may also be increased but the increase in its turnover may be responsible for the diminished activity. 相似文献
8.
9.
Guntur E Luis Chee-Khuen Yong Deepak A Singh S Sengupta David SK Choon 《Journal of orthopaedic surgery and research》2007,2(1):22-10
Background
Acromioclavicular injuries are common in sports medicine. Surgical intervention is generally advocated for chronic instability of Rockwood grade III and more severe injuries. Various methods of coracoclavicular ligament reconstruction and augmentation have been described. The objective of this study is to compare the biomechanical properties of a novel palmaris-longus tendon reconstruction with those of the native AC+CC ligaments, the modified Weaver-Dunn reconstruction, the ACJ capsuloligamentous complex repair, screw and clavicle hook plate augmentation. 相似文献10.