全文获取类型
收费全文 | 32736篇 |
免费 | 2075篇 |
国内免费 | 260篇 |
专业分类
耳鼻咽喉 | 438篇 |
儿科学 | 597篇 |
妇产科学 | 490篇 |
基础医学 | 4050篇 |
口腔科学 | 1548篇 |
临床医学 | 2693篇 |
内科学 | 8789篇 |
皮肤病学 | 391篇 |
神经病学 | 3331篇 |
特种医学 | 1297篇 |
外科学 | 5255篇 |
综合类 | 93篇 |
一般理论 | 6篇 |
预防医学 | 1340篇 |
眼科学 | 539篇 |
药学 | 1707篇 |
中国医学 | 72篇 |
肿瘤学 | 2435篇 |
出版年
2023年 | 333篇 |
2022年 | 310篇 |
2021年 | 1252篇 |
2020年 | 745篇 |
2019年 | 1022篇 |
2018年 | 1205篇 |
2017年 | 956篇 |
2016年 | 1067篇 |
2015年 | 1130篇 |
2014年 | 1459篇 |
2013年 | 1777篇 |
2012年 | 2776篇 |
2011年 | 2672篇 |
2010年 | 1499篇 |
2009年 | 1363篇 |
2008年 | 2145篇 |
2007年 | 2256篇 |
2006年 | 2029篇 |
2005年 | 1842篇 |
2004年 | 1642篇 |
2003年 | 1495篇 |
2002年 | 1297篇 |
2001年 | 262篇 |
2000年 | 235篇 |
1999年 | 241篇 |
1998年 | 240篇 |
1997年 | 201篇 |
1996年 | 153篇 |
1995年 | 141篇 |
1994年 | 127篇 |
1993年 | 106篇 |
1992年 | 117篇 |
1991年 | 93篇 |
1990年 | 79篇 |
1989年 | 54篇 |
1988年 | 85篇 |
1987年 | 61篇 |
1986年 | 44篇 |
1985年 | 63篇 |
1984年 | 52篇 |
1983年 | 43篇 |
1982年 | 43篇 |
1981年 | 28篇 |
1980年 | 24篇 |
1979年 | 41篇 |
1978年 | 30篇 |
1977年 | 22篇 |
1974年 | 21篇 |
1973年 | 31篇 |
1972年 | 26篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
Viviana Maestrini Lucia I. Birtolo Sara Cimino Paolo Severino Massimo Mancone Marco Francone Sanjay M. Banypersad Flavia Ventriglia Luigi Tritapepe Fabio Miraldi Francesco Fedele 《Echocardiography (Mount Kisco, N.Y.)》2019,36(5):992-995
A 20‐year‐old Congolese woman presented with presyncope, dyspnea, and anasarca. Past medical history was unremarkable. Echocardiography revealed a rare combination of giant right atrium (RA), a dilated and hypertrophied right ventricle, subvalvular pulmonary stenosis (subPS), severe tricuspid regurgitation (TR), pericardial effusion and what appeared to be a spontaneously closed ventricular septal defect (VSD). Cardiac Magnetic Resonance and Cardiac Computed Tomography confirmed the findings excluding the presence of intra‐cardiac and extra‐cardiac shunt and other associated congenital anomalies. The patient underwent subPS resection, right atrioplasty, and tricuspid annuloplasty. Multimodality approach facilitated the detection of the abnormalities and provided clarity when determining the optimal surgical strategy. 相似文献
13.
Fabio Frosio Federico Mocchegiani Grazia Conte Enrico Dalla Bona ANDrea Vecchi Daniele Nicolini Marco Vivarelli 《World journal of gastrointestinal surgery》2019,(6)
Cholangiocarcinoma(CCA) is a malignant tumor of the biliary system and includes, according to the anatomical classification, intra hepatic CCA(iCCA),hilar CCA(hCCA) and distal CCA(dCCA). Hilar CCA is the most challenging type in terms of diagnosis, treatment and prognosis. Surgery is the only treatment possibly providing long-term survival, but only few patients are considered resectable at the time of diagnosis. In fact, tumor's extension to segmentary or subsegmentary biliary ducts, along with large lymph node involvement or intrahepatic metastases, precludes the surgical approach. To achieve R0 margins is mandatory for the disease-free survival and overall survival. In case of unresectable locally advanced hCCA, radiochemotherapy(RCT) as neoadjuvant treatment demonstrated to be a therapeutic option before either hepatic resection or liver transplantation. Before liver surgery, RCT is believed to enhance the R0 margins rate. For patients meeting the Mayo Clinic criteria, RCT prior to orthotopic liver transplant(OLT) has proved to produce acceptable 5-years survivals. In this review, we analyze the current role of neoadjuvant RCT before resection as well as before OLT. 相似文献
14.
15.
16.
Alessandro Abbouda Paolo Tortorella Lucia Restivo Elisa Santoro Federica De Marco Maurizio La Cava 《Seminars in ophthalmology》2016,31(6):532-541
Purpose: To evaluate the rate and onset of intraoperative and postoperative complications post-phacoemulsification. Methods: One hundred sixty-two eyes of 145 patients with uveitis who underwent phacoemulsification between 2006 and 2009 were identified through surgical record review. Fifty-nine eyes of 46 patients met the inclusion criteria. Hazard ratio (HR) and Kaplan-Meier survival probability were calculated for each class of uveitis. Results: Macular edema (ME) resulted to be associated to chronic postoperative inflammation (r?=?0.6; p?=?0.00) and mostly related to patients who presented more than one postoperative relapse/year (r?=?0.2; p?=?0.02). Fuchs uveitis resulted to be a risk factor for posterior capsule opacification (PCO) (HR 3.36 IC95%1.0-10.5; p?=?0.03). Hypotony and elevated intraocular pressure (IOP) were detected in the anterior uveitis group (0.02 EY). Conclusion: The HR to develop ME was significantly related to chronic anterior uveitis. PCO and elevated IOP are most frequent in Fuchs uveitis. The postoperative visual acuity result was good among all the uveitis groups. 相似文献
17.
18.
19.
Umar Nadia K. Badshah Maaz B. Sandrasegaran Kumar Ghabril Marwan Agarwal Saurabh Tann Mark Lacerda Marco Kwo Paul Y. 《Digestive diseases and sciences》2015,60(7):2196-2200
Digestive Diseases and Sciences - To determine whether the presence of portal vein thrombosis (PVT) where venous flow within the liver may be altered may delay the diagnosis of HCC and be... 相似文献
20.
Marco Maruzzo Umberto Basso Eugenio Borsatti Laura Evangelista Filippo Alongi Orazio Caffo Francesca Maines Sara Galuppo Rocco De Vivo Fable Zustovich Dario Palleschi Andrea Zivi Teodoro Sava Mariella Sorarù Roberto Iacovelli Maurizio Nicodemo Susanne Baier Lucia Fratino Vittorina Zagonel 《Clinical genitourinary cancer》2019,17(1):e187-e194