全文获取类型
收费全文 | 1712篇 |
免费 | 217篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 24篇 |
儿科学 | 57篇 |
妇产科学 | 29篇 |
基础医学 | 152篇 |
口腔科学 | 48篇 |
临床医学 | 240篇 |
内科学 | 346篇 |
皮肤病学 | 111篇 |
神经病学 | 101篇 |
特种医学 | 145篇 |
外科学 | 269篇 |
综合类 | 99篇 |
现状与发展 | 30篇 |
预防医学 | 79篇 |
眼科学 | 27篇 |
药学 | 87篇 |
中国医学 | 9篇 |
肿瘤学 | 95篇 |
出版年
2024年 | 18篇 |
2023年 | 185篇 |
2022年 | 21篇 |
2021年 | 36篇 |
2020年 | 69篇 |
2019年 | 36篇 |
2018年 | 82篇 |
2017年 | 60篇 |
2016年 | 57篇 |
2015年 | 71篇 |
2014年 | 107篇 |
2013年 | 88篇 |
2012年 | 71篇 |
2011年 | 68篇 |
2010年 | 100篇 |
2009年 | 103篇 |
2008年 | 56篇 |
2007年 | 74篇 |
2006年 | 42篇 |
2005年 | 37篇 |
2004年 | 18篇 |
2003年 | 25篇 |
2002年 | 28篇 |
2001年 | 16篇 |
2000年 | 19篇 |
1999年 | 33篇 |
1998年 | 39篇 |
1997年 | 49篇 |
1996年 | 44篇 |
1995年 | 39篇 |
1994年 | 31篇 |
1993年 | 35篇 |
1992年 | 9篇 |
1991年 | 10篇 |
1990年 | 11篇 |
1989年 | 26篇 |
1988年 | 20篇 |
1987年 | 16篇 |
1986年 | 4篇 |
1985年 | 12篇 |
1984年 | 5篇 |
1983年 | 3篇 |
1982年 | 8篇 |
1981年 | 10篇 |
1980年 | 12篇 |
1978年 | 5篇 |
1977年 | 3篇 |
1976年 | 15篇 |
1975年 | 10篇 |
1974年 | 3篇 |
排序方式: 共有1948条查询结果,搜索用时 0 毫秒
51.
52.
53.
54.
55.
Classifying CT/MR findings in patients with suspicion of hepatocellular carcinoma: Comparison of liver imaging reporting and data system and criteria‐free Likert scale reporting models
下载免费PDF全文
![点击此处可从《Journal of magnetic resonance imaging : JMRI》网站下载免费的PDF全文](/ch/ext_images/free.gif)
56.
57.
58.
F. Wang MClinEpid FRACS A. J. Gill MD FRACP M. Neale MM FRACS V. Puttaswamy MBBS FRACS S. Gananadha MS FRACS N. Pavlakis PhD FRACP S. Clarke MD FRACP T. J. Hugh MD FRACS J. S. Samra DPhil FRACS 《Annals of surgical oncology》2014,21(6):1937-1947
Background
Although pancreatoduodenectomy (PD) with mesenterico-portal vein resection (VR) can be performed safely in patients with resectable pancreatic ductal adenocarcinoma (PDAC), the impact of this approach on long-term survival is controversial.Patients and Methods
Analyses of a prospectively collected database revealed 122 consecutive patients with PDAC who underwent PD with (PD+VR) or without (PD?VR) VR between January 2004 and May 2012. Clinical data, operative results, and survival outcomes were analysed.Results
Sixty-four (53 %) patients underwent PD+VR. The majority (84 %) of the venous reconstructions were performed with a primary end-to-end anastomosis. Demographic and postoperative outcomes were similar between the two groups. American Society of Anesthesiologists (ASA) score, duration of operation, intraoperative blood loss, and blood transfusion requirement were significantly greater in the PD+VR group compared with the PD?VR group. Furthermore, the tumor size was larger, and the rates of periuncinate neural invasion and positive resection margin were higher in the PD+VR group compared with the PD?VR group. Histological venous involvement occurred in 47 of 62 (76 %) patients in the PD+VR group. At a median follow-up of 29 months, the median overall survival (OS) was 18 months for the PD+VR group, and 31 months for the PD?VR group (p = 0.016). ASA score, lymph node metastasis, neurovascular invasion, and tumor differentiation were predictive of survival. The need for VR in itself was not prognostic of survival.Conclusions
PD with VR has similar morbidity but worse OS compared with a PD?VR. Although VR is not predictive of survival, tumors requiring a PD+VR have more adverse biological features. 相似文献59.
60.
Bo Pang MM Yonghuai Wang MD Shuang Liu MD PhD Jun Yang MD PhD Tianxiang Gu MD PhD Chunyan Ma MD PhD 《Journal of clinical ultrasound : JCU》2019,47(6):376-379
Barlow's disease is a complicated form of degenerative mitral valve (MV) disease. Infective endocarditis (IE) often occurs on the basis of primary heart diseases and may be combined with valve perforations. Cleft-like indentations (CLIs) were suggested by Ring et al. in 2013. They are located at the inter-scallop position and involve at least one-half of the valve. Herein, we report a case of Barlow's disease combined with IE and CLIs, which was confirmed intra-operatively and by histopathological examination. The CLIs were misdiagnosed by two-dimensional transthoracic echocardiography as perforations, but rightly interpreted by preoperative three-dimensional echocardiography. The possibility of CLIs should be considered in the evaluation of mitral regurgitation caused by myxomatous MV diseases. 相似文献