全文获取类型
收费全文 | 199929篇 |
免费 | 2220篇 |
国内免费 | 98篇 |
专业分类
耳鼻咽喉 | 1538篇 |
儿科学 | 7091篇 |
妇产科学 | 3311篇 |
基础医学 | 19909篇 |
口腔科学 | 2187篇 |
临床医学 | 14034篇 |
内科学 | 36866篇 |
皮肤病学 | 1300篇 |
神经病学 | 18095篇 |
特种医学 | 9864篇 |
外国民族医学 | 1篇 |
外科学 | 32827篇 |
综合类 | 2447篇 |
一般理论 | 2篇 |
预防医学 | 18691篇 |
眼科学 | 3029篇 |
药学 | 11316篇 |
中国医学 | 700篇 |
肿瘤学 | 19039篇 |
出版年
2022年 | 286篇 |
2021年 | 437篇 |
2020年 | 266篇 |
2019年 | 348篇 |
2018年 | 22258篇 |
2017年 | 17640篇 |
2016年 | 19845篇 |
2015年 | 1288篇 |
2014年 | 1369篇 |
2013年 | 1411篇 |
2012年 | 7986篇 |
2011年 | 22077篇 |
2010年 | 19400篇 |
2009年 | 12071篇 |
2008年 | 20441篇 |
2007年 | 22763篇 |
2006年 | 1609篇 |
2005年 | 3316篇 |
2004年 | 4435篇 |
2003年 | 5259篇 |
2002年 | 3414篇 |
2001年 | 1273篇 |
2000年 | 1355篇 |
1999年 | 1046篇 |
1998年 | 503篇 |
1997年 | 408篇 |
1996年 | 319篇 |
1995年 | 285篇 |
1994年 | 254篇 |
1993年 | 242篇 |
1992年 | 663篇 |
1991年 | 630篇 |
1990年 | 655篇 |
1989年 | 604篇 |
1988年 | 566篇 |
1987年 | 520篇 |
1986年 | 482篇 |
1985年 | 454篇 |
1984年 | 329篇 |
1983年 | 277篇 |
1982年 | 182篇 |
1979年 | 247篇 |
1977年 | 187篇 |
1974年 | 166篇 |
1973年 | 179篇 |
1972年 | 187篇 |
1971年 | 190篇 |
1970年 | 191篇 |
1969年 | 206篇 |
1968年 | 187篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
According to our observation in ACL reconstruction, we find root tears of the posterior horn of the lateral meniscus as a
common concomitant injury in ACL-deficient knees. This might be a consequence of initial trauma or of the increased anterior–posterior
translation of the tibia and an overload impact on the posterior meniscus root in ACL-deficient knees. A tear of the posterior
horn of the medial meniscus causes a 25% increase in peak pressure in the medial compartment compared with that found in the
intact condition. The repair restores the peak contact pressure to normal (Allaire et al. in J Bone Joint Surg Am 90(9):1922–1931,
[2008]). A tear of the posterior horn of the lateral meniscus might have similar consequences. We hypothesize the surgical anatomical
reattachment of the root at the tibia helping to restore knee joint kinematics and helping to advance ACL-graft function.
This article presents an arthroscopical technique to reattach the posterior meniscus root in combination with ACL double-bundle
reconstruction. The procedure uses the tibial PL tunnel to fix the meniscus suture. 相似文献
992.
Background
Although the role of endoscopic ultrasound (EUS) in the initial staging of esophageal cancer is well established, its role in assessing tumor response and staging esophageal cancers after neoadjuvant chemotherapy (NAC) is controversial, and this study aimed to investigate this role. 相似文献993.
Introduction
A finite element model of the L4-L5 human segment was employed to carry out a parametric biomechanical investigation of lumbar interbody fusion with a novel “sandwich” cage having an inner stiff core and two softer layers in the areas close to the endplates, with and without posterior fixation. 相似文献994.
Background
Lymph node metastases occur frequently in patients with papillary thyroid carcinoma (PTC), and the central compartment of the neck is the most frequently involved site. Some authors advocate prophylactic central neck dissection (CND) during total thyroidectomy. However, little is known about the effects of prophylactic unilateral CND in papillary thyroid microcarcinoma (PTMC) patients who undergo hemithyroidectomy. This study was designed to investigate the impact of prophylactic unilateral CND in this population. 相似文献995.
Background
Trocar entry points have been identified as a significant source of pain after laparoscopic surgery. This is particularly true of the larger 12-mm ports that require deep fascial closure to avoid port-site herniation. We investigated whether using radially expanding trocars not requiring fascial closure compared to conventional cutting trocars for the 12-mm port in transabdominal preperitoneal (TAPP) hernia repairs had any effect on postoperative analgesic requirements and return to work or normal activity. 相似文献996.
Study design
Report of case series 相似文献997.
Fernando Rotellar Fernando Pardo Alvaro Bueno Pablo Martí-Cruchaga Gabriel Zozaya 《Langenbeck's archives of surgery / Deutsche Gesellschaft fur Chirurgie》2012,397(3):481-485
Purpose
This paper aims to describe an extracorporeal tourniquet (ET) method for laparoscopic Pringle maneuver (PM). 相似文献998.
We report a case of primary malignant melanoma (MM) of the stomach. The patient, a 73-year-old man, was referred to our hospital
for investigation of an elevated lesion in the stomach, detected by gastroscopy. On admission, physical examinations and laboratory
data were unremarkable. Gastroscopy revealed a pigmented, elevated tumor, approximately 2 cm in diameter, in the posterior
wall of the stomach. A biopsy was taken, which resulted in a diagnosis of MM, based on the presence of melanin in tumor cells.
F-18 fluorodeoxyglucose positron emission tomography showed no accumulation of tracer except for the tumor in the stomach,
indicating that it was a primary MM of the stomach. The patient underwent distal gastrectomy, but died of recurrence 1 year
later. Very few cases of primary MM of the stomach have been reported. Thus, we report this case, followed by a review of
the literature. 相似文献
999.
Goto SN Matsui M Manabe H Takagi H Umemoto T 《General thoracic and cardiovascular surgery》2012,60(3):157-160
We describe a 48-year-old man with aorto-pseudoaneurysm-ventricular regurgitation. It was due to disruption of both proximal
and distal anastomoses after aortic root replacement for detachment of a prosthetic valve implanted for a sinus of Valsalva
aneurysm with aortic valve regurgitation. The chest was opened during cardiopulmonary bypass using a deep hypothermic circulatory
arrest to avoid rupture of the aneurysm because of a close relation between the pseudoaneurysm and the sternum. Aortic root
re-replacement was performed successfully. 相似文献
1000.