首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   123839篇
  免费   10175篇
  国内免费   297篇
耳鼻咽喉   1428篇
儿科学   3331篇
妇产科学   2137篇
基础医学   16503篇
口腔科学   1883篇
临床医学   13566篇
内科学   25403篇
皮肤病学   1565篇
神经病学   12492篇
特种医学   4987篇
外国民族医学   4篇
外科学   19049篇
综合类   1628篇
一般理论   125篇
预防医学   10242篇
眼科学   3125篇
药学   8394篇
  2篇
中国医学   140篇
肿瘤学   8307篇
  2023年   768篇
  2022年   1048篇
  2021年   2963篇
  2020年   1656篇
  2019年   2722篇
  2018年   3148篇
  2017年   2338篇
  2016年   2441篇
  2015年   2839篇
  2014年   4048篇
  2013年   5417篇
  2012年   8353篇
  2011年   8714篇
  2010年   4782篇
  2009年   4217篇
  2008年   7139篇
  2007年   7542篇
  2006年   7039篇
  2005年   6905篇
  2004年   6356篇
  2003年   5850篇
  2002年   5484篇
  2001年   2115篇
  2000年   1940篇
  1999年   1924篇
  1998年   1303篇
  1997年   1078篇
  1996年   946篇
  1995年   873篇
  1994年   794篇
  1993年   737篇
  1992年   1403篇
  1991年   1356篇
  1990年   1266篇
  1989年   1246篇
  1988年   1055篇
  1987年   1151篇
  1986年   1080篇
  1985年   1097篇
  1984年   936篇
  1983年   765篇
  1982年   626篇
  1981年   595篇
  1980年   531篇
  1979年   792篇
  1978年   636篇
  1977年   541篇
  1976年   524篇
  1974年   568篇
  1973年   497篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
Heart Failure Reviews - The nitric oxide (NO)–guanylate cyclase (GC)–cyclic guanosine monophosphate (cGMP) pathway plays an important role in cardiovascular, pulmonary and renal...  相似文献   
5.
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia.  相似文献   
6.
7.
Abstract

Objective

Ras wild-type metastatic colorectal cancers (mCRC) may be treated with anti-vascular endothelial growth factor (VEGF) or anti-epidermal growth factor receptor (EGFR) agents. We aim to estimate patients’ preferences for mCRC treatment and relative importance of cost, efficacy improvement, avoidance of side effects and therapy convenience, and relative uptake between profiles that resemble Bevacizumab (anti-VEGF) and Cetuximab (anti-EGFR), two commonly prescribed mCRC targeted therapies.  相似文献   
8.
9.
10.
Background A high Mandard score implies a non-response to chemotherapy in oesophageal adenocarcinoma. However, some patients exhibit tumour volume reduction and a nodal response despite a high score. This study examines survival and recurrence patterns in these patients.Methods Clinicopathological factors were analysed using multivariable Cox regression assessing time to death and recurrence. Computed tomography-estimated tumour volume change was examined in a subgroup of consecutive patients.Results Five hundred and fifty-five patients were included. Median survival was 55 months (Mandard 1–3) and 21 months (Mandard 4 and 5). In the Mandard 4 and 5 group (332 patients), comparison between complete nodal responders and persistent nodal disease showed improved survival (90 vs 18 months), recurrence rates (locoregional 14.75 vs 28.74%, systemic 24.59 vs 48.42%) and circumferential resection margin positivity (22.95 vs 68.11%). Complete nodal response independently predicted improved survival (hazard ratio 0.34 (0.16–0.74). Post-chemotherapy tumour volume reduction was greater in patients with a complete nodal response (−16.3 vs −7.7 cm3, p = 0.033) with no significant difference between Mandard groups.Conclusion Patients with a complete nodal response to chemotherapy have significantly improved outcomes despite a poor Mandard score. High Mandard score does not correspond with a non-response to chemotherapy in all cases and patients with nodal downstaging may still benefit from adjuvant chemotherapy.Subject terms: Oesophageal cancer, Surgical oncology  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号