全文获取类型
收费全文 | 11290篇 |
免费 | 701篇 |
国内免费 | 48篇 |
专业分类
耳鼻咽喉 | 108篇 |
儿科学 | 404篇 |
妇产科学 | 186篇 |
基础医学 | 1244篇 |
口腔科学 | 369篇 |
临床医学 | 789篇 |
内科学 | 2645篇 |
皮肤病学 | 240篇 |
神经病学 | 554篇 |
特种医学 | 332篇 |
外科学 | 1572篇 |
综合类 | 196篇 |
一般理论 | 5篇 |
预防医学 | 651篇 |
眼科学 | 534篇 |
药学 | 1100篇 |
中国医学 | 57篇 |
肿瘤学 | 1053篇 |
出版年
2023年 | 62篇 |
2022年 | 164篇 |
2021年 | 291篇 |
2020年 | 158篇 |
2019年 | 222篇 |
2018年 | 288篇 |
2017年 | 188篇 |
2016年 | 223篇 |
2015年 | 289篇 |
2014年 | 386篇 |
2013年 | 460篇 |
2012年 | 709篇 |
2011年 | 762篇 |
2010年 | 372篇 |
2009年 | 375篇 |
2008年 | 532篇 |
2007年 | 562篇 |
2006年 | 576篇 |
2005年 | 514篇 |
2004年 | 480篇 |
2003年 | 448篇 |
2002年 | 395篇 |
2001年 | 301篇 |
2000年 | 313篇 |
1999年 | 232篇 |
1998年 | 115篇 |
1997年 | 75篇 |
1996年 | 74篇 |
1995年 | 74篇 |
1993年 | 52篇 |
1992年 | 168篇 |
1991年 | 169篇 |
1990年 | 161篇 |
1989年 | 139篇 |
1988年 | 143篇 |
1987年 | 167篇 |
1986年 | 139篇 |
1985年 | 113篇 |
1984年 | 119篇 |
1983年 | 83篇 |
1982年 | 55篇 |
1980年 | 51篇 |
1979年 | 68篇 |
1977年 | 56篇 |
1976年 | 59篇 |
1975年 | 57篇 |
1974年 | 81篇 |
1973年 | 68篇 |
1972年 | 55篇 |
1971年 | 53篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
R Srikanth D Mukunda Reddy A Mosahebi 《Journal of plastic, reconstructive & aesthetic surgery》2006,59(12):1318-1324
The numbers of free flap donor site as well as their indications are constantly increasing. Despite increasing popularity of microvascular reconstructive procedures, literature lacks clear and objective outcome criteria. This paper reports on a simple outcome classification that has become a routine part of the unit's large workload of microvascular outcome recording. The classification was formed through a retrospective analysis of 241 consecutive cases from 2000 to 2001 and is a five graded numerical classification. Grade 1 equates to total success without co-morbidity and grade 5 to a major complication such as amputation, etc., whatever the status of the flap itself. From 2002 to 2005 the classification was prospectively used on 527 consecutive cases with ease of integration into routine clinical practice. The Classification would enable a more objective record keeping thus analysis of the outcome. It would allow a more realistic comparison of different techniques or donor types as well set a benchmarking level for further improvement of the results. 相似文献
4.
Postoperative nomogram for disease-specific survival after an R0 resection for gastric carcinoma. 总被引:8,自引:0,他引:8
Michael W Kattan Martin S Karpeh Madhu Mazumdar Murray F Brennan 《Journal of clinical oncology》2003,21(19):3647-3650
PURPOSE: Few published studies have addressed individual patient risk after R0 resection for gastric cancer. We developed and internally validated a nomogram that combines these factors to predict the probability of 5-year gastric cancer-specific survival on the basis of 1,039 patients treated at a single institution. METHODS: Nomogram predictor variables included age, sex, primary site (distal one-third, middle one-third, gastroesophageal junction, and proximal one-third), Lauren histotype (diffuse, intestinal, mixed), number of positive lymph nodes resected, number of negative lymph nodes resected, and depth of invasion. Death as a result of gastric cancer was the predicted end point. The concordance index was used as an accuracy measure, with bootstrapping to correct for optimistic bias. Calibration plots were constructed. RESULTS: Gastric cancer-specific survival at 5 years was 50%. A nomogram was constructed on the basis of a Cox regression model. The bootstrap-corrected concordance index was 0.80. When compared with the predictive ability of American Joint Committee on Cancer stage, the nomogram discrimination was superior (P <.001). Nomogram calibration appeared to be excellent. CONCLUSION: A nomogram was developed to predict 5-year disease-specific survival after R0 resection for gastric cancer. This tool should be useful for patient counseling, follow-up scheduling, and clinical trial eligibility determination. 相似文献
5.
Parupudi V J Sriram Guduru V Rao Nageshwar D Reddy 《Indian journal of gastroenterology》2006,25(1):39-41
Endoscopic clips have been used mainly for control of gastrointestinal (GI) bleeding and occasionally for closure of GI perforations. However, closure of spontaneous esophageal perforation (Boerhaave's syndrome) by clipping has not been reported. We described successful non-surgical closure of spontaneous esophageal perforation by endoscopic clipping in a patient with bilateral pyopneumothorax and septicemia. 相似文献
6.
7.
Pankaj Dabir Snehal Dabir B V Siva Prasad M V R Reddy 《Infection, genetics and evolution》2006,6(4):287-291
Molecular characterization of Wuchereria bancrofti is essential to develop suitable anti-filarial drugs and vaccines. We describe here isolation, sequence analysis and cloning of a partial cDNA of an enzyme superoxide dismutase from this parasite. The immunoscreening of a lambda zap W. bancrofti microfilarial (Mf) cDNA library with microfilaremic sera had resulted in the isolation of several seroreactive clones including, WbSOD. This clone contained a 309 bp insert and showed significant nucleotide and deduced amino acid sequence homologies to the superoxide dismutases of other nematode parasites. The antioxidant property of this enzyme may have important contribution in the defense mechanism of the parasite against host immune response. 相似文献
8.
J D Woolgar D S Reddy J V Robbs 《European journal of vascular and endovascular surgery》2002,23(3):255-259
OBJECTIVES: to examine the management and outcome of patients with traumatic popliteal artery pseudoaneurysms with delayed presentation. MATERIALS: over a 2-year period 7 patients with traumatic popliteal pseudoaneurysms presenting to a tertiary referral unit after a delay of 1 month were reviewed. METHODS: a retrospective review of clinical records. RESULTS: the median interval between injury and presentation was 1.5 months (range 1-24 months). Penetrating trauma from gunshot wounds was the cause of the initial vascular injury in 6 patients and a stab wound in one. All patients had large pseudoaneurysms of more than 8 cm filling the popliteal fossa with variable degrees of fixed flexion deformity (FFD) of the knee. Severe FFD of more than 40 degrees was noted in 2 patients and 3 others had mild flexion deformities of 10 to 20 degrees. Six patients underwent repair of the pseudoaneurysm. One patient required an above knee amputation due to an infected false aneurysm. There were no deaths or graft related complications. Despite aggressive post-operative physiotherapy only 2 patients were able to completely straighten the leg at the time of discharge. CONCLUSIONS: in patients with neglected popliteal artery pseudoaneurysms, morbidity is associated with the pre-operative degree of fixed flexion deformity of the knee. 相似文献
9.
10.