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   79959篇
  免费   6341篇
  国内免费   265篇
耳鼻咽喉   910篇
儿科学   2142篇
妇产科学   1541篇
基础医学   11044篇
口腔科学   1461篇
临床医学   8175篇
内科学   16377篇
皮肤病学   1570篇
神经病学   7560篇
特种医学   2920篇
外国民族医学   7篇
外科学   12847篇
综合类   1117篇
一般理论   101篇
预防医学   5867篇
眼科学   2138篇
药学   5328篇
中国医学   120篇
肿瘤学   5340篇
  2023年   548篇
  2022年   938篇
  2021年   2296篇
  2020年   1416篇
  2019年   1938篇
  2018年   2186篇
  2017年   1557篇
  2016年   1781篇
  2015年   2082篇
  2014年   2805篇
  2013年   3573篇
  2012年   5672篇
  2011年   5705篇
  2010年   3075篇
  2009年   2789篇
  2008年   4514篇
  2007年   4802篇
  2006年   4474篇
  2005年   4349篇
  2004年   4052篇
  2003年   3648篇
  2002年   3421篇
  2001年   1117篇
  2000年   1109篇
  1999年   1149篇
  1998年   874篇
  1997年   675篇
  1996年   558篇
  1995年   535篇
  1994年   481篇
  1993年   435篇
  1992年   771篇
  1991年   723篇
  1990年   661篇
  1989年   637篇
  1988年   589篇
  1987年   530篇
  1986年   563篇
  1985年   554篇
  1984年   474篇
  1983年   413篇
  1982年   392篇
  1981年   338篇
  1980年   335篇
  1979年   430篇
  1978年   337篇
  1977年   278篇
  1976年   261篇
  1974年   281篇
  1973年   282篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
Journal of Neuro-Oncology - Adjuvant radiation is often used in patients with low grade gliomas with high-risk characteristics with a recommended dose of 45–54 Gy. We used the...  相似文献   
3.
4.
5.
6.
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   
7.
There is a sharp difference in how one views TCR structure–function–behaviour dependent on whether its recognition of major histocompatibility complex‐encoded restriction elements (R) is germline selected or somatically generated. The generally accepted or Standard model is built on the assumption that recognition of R is by the V regions of the αβ TCR, which is not driven by allele specificity, whereas the competing model posits that recognition of R is allele‐specific. The establishing of allele‐specific recognition of R by the TCR would rule out the Standard model and clear the road to a consideration of a competing construct, the Tritope model. Here, the case for allele‐specific recognition (germline selected) is detailed making it obvious that the Standard model is untenable.  相似文献   
8.

Introduction

Compression fractures of the cuboid bone in children and adolescents are rare. Fracture morphology, associated lesions, treatment options and long-term outcomes of this very rare injury are published in a few case reports. This study with review of the literature aims to support the understanding of fracture pattern and optimize pathways of decision making.

Material and Methods

A retrospective two-center study was performed in a patient cohort treated between 2001 and 2016. All patients aged less than 18 years who sustained a cuboid fracture were included. Age, gender, mechanism of injury, fracture morphology, amount of displacement, associated injuries, and therapy were analyzed. In the follow-up (FU), the AOFAS Midfoot Scale was investigated.

Results

Fractures of the cuboid bone were diagnosed in 7 boys and 9 girls. The mean age of the patients was 10 years (range: 2.2–16.1 years). According to the classification of Fenton we detected 11 (69%) type 2, 2 (12%) type 3 and 3 (19%) type 5b fractures. Other fracture types according to Fenton were not observed. All children under 10 years sustained a type 2 fracture. Open reduction and internal fixation was performed in 5 (31%) patients. Bone grafting was not necessary. FU was performed in 14/16 patients on average after 9 years (mean; range: 1.4–16.2 years). The mean AOFAS Midfoot Scale at FU for extra-articular type 2 fractures was 100 points, whereas in intra-articular fractures (Type 3) and fractures associated with mid-tarsal disruption (type 5b) worse results were found (95 and 66 points, accordingly).

Conclusion

This rare injury shows inhomogenous morphologies and offers different treatment approaches. Extra-articular Fenton type 2 lesions are the most common type of cuboid fracture in children (69%). A potential loss of length of the lateral column must be considered. In contrast to adults, type 1, 4, and 5a fractures were not found in our cohort of children and adolescents. Lower scores of the AOFAS Midfoot Scale were found with either intra-articular involvement or associated midfoot lesions.  相似文献   
9.
10.
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