全文获取类型
收费全文 | 19630篇 |
免费 | 2113篇 |
国内免费 | 459篇 |
专业分类
耳鼻咽喉 | 85篇 |
儿科学 | 493篇 |
妇产科学 | 171篇 |
基础医学 | 1276篇 |
口腔科学 | 423篇 |
临床医学 | 4361篇 |
内科学 | 7949篇 |
皮肤病学 | 52篇 |
神经病学 | 340篇 |
特种医学 | 692篇 |
外国民族医学 | 4篇 |
外科学 | 1341篇 |
综合类 | 2529篇 |
现状与发展 | 2篇 |
一般理论 | 1篇 |
预防医学 | 742篇 |
眼科学 | 48篇 |
药学 | 702篇 |
16篇 | |
中国医学 | 407篇 |
肿瘤学 | 568篇 |
出版年
2024年 | 34篇 |
2023年 | 302篇 |
2022年 | 433篇 |
2021年 | 673篇 |
2020年 | 941篇 |
2019年 | 862篇 |
2018年 | 844篇 |
2017年 | 692篇 |
2016年 | 685篇 |
2015年 | 751篇 |
2014年 | 1344篇 |
2013年 | 1139篇 |
2012年 | 1044篇 |
2011年 | 1184篇 |
2010年 | 903篇 |
2009年 | 924篇 |
2008年 | 991篇 |
2007年 | 1030篇 |
2006年 | 870篇 |
2005年 | 693篇 |
2004年 | 620篇 |
2003年 | 586篇 |
2002年 | 469篇 |
2001年 | 511篇 |
2000年 | 444篇 |
1999年 | 407篇 |
1998年 | 378篇 |
1997年 | 339篇 |
1996年 | 257篇 |
1995年 | 286篇 |
1994年 | 203篇 |
1993年 | 211篇 |
1992年 | 215篇 |
1991年 | 151篇 |
1990年 | 96篇 |
1989年 | 83篇 |
1988年 | 80篇 |
1987年 | 86篇 |
1986年 | 70篇 |
1985年 | 83篇 |
1984年 | 68篇 |
1983年 | 57篇 |
1982年 | 59篇 |
1981年 | 35篇 |
1980年 | 22篇 |
1979年 | 19篇 |
1978年 | 13篇 |
1977年 | 5篇 |
1976年 | 5篇 |
1975年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Defining con-founders that affect the reliability of diagnostic tests for coronavirus disease 2019 is vital to breaking the chain of infection. The elderly population is a higher risk group for the emerging virus. However, gender seems to exert a critical role in modifying the infection risk among women owing to hormonal changes. The menopause transition is an exceptional period for older women where the protective and immunomodulatory effects of the estrogen hormone are lost. Accordingly, attention should be given to postmenopausal women since they will have an increased risk compared to their pre-menopausal peers. 相似文献
2.
3.
4.
5.
6.
Wojciech Szychta M.D. Ph.D. Gheorghe Cerin M.D. Ph.D. F.E.S.C. Bogdan Adrian Popa M.D. Armienti Felice M.D. Guido Lanzillo M.D. Ph.D. Marco Diena M.D. Grzegorz Opolski M.D. Ph.D. F.E.S.C. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(6):1040-1043
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning. 相似文献
7.
Improvement in Tricuspid Annular Plane Systolic Excursion with Pulmonary Hypertension Therapy in Pediatric Patients
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
8.
9.
10.
Peng‐fei Lei Shi‐long Su Ling‐yu Kong Cheng‐gong Wang Da Zhong Yi‐he Hu 《Orthopaedic Surgery》2019,11(5):914-920
Three‐dimensional (3D) printing technology, virtual reality, and augmented reality technology have been used to help surgeons to complete complex total hip arthroplasty, while their respective shortcomings limit their further application. With the development of technology, mixed reality (MR) technology has been applied to improve the success rate of complicated hip arthroplasty because of its unique advantages. We presented a case of a 59‐year‐old man with an intertrochanteric fracture in the left femur, who had received a prior left hip fusion. After admission to our hospital, a left total hip arthroplasty was performed on the patient using a combination of MR technology and 3D printing technology. Before surgery, 3D reconstruction of a certain bony landmark exposed in the surgical area was first performed. Then a veneer part was designed according to the bony landmark and connected to a reference registration landmark outside the body through a connecting rod. After that, the series of parts were made into a holistic reference registration instrument using 3D printing technology, and the patient's data for bone and surrounding tissue, along with digital 3D information of the reference registration instrument, were imported into the head‐mounted display (HMD). During the operation, the disinfected reference registration instrument was installed on the selected bony landmark, and then the automatic real‐time registration was realized by HMD through recognizing the registration landmark on the reference registration instrument, whereby the patient's virtual bone and other anatomical structures were quickly and accurately superimposed on the real body of the patient. To the best of our knowledge, this is the first report to use MR combined with 3D printing technology in total hip arthroplasty. 相似文献