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   187359篇
  免费   1667篇
  国内免费   50篇
耳鼻咽喉   1207篇
儿科学   6889篇
妇产科学   3251篇
基础医学   18011篇
口腔科学   2033篇
临床医学   13278篇
内科学   34078篇
皮肤病学   945篇
神经病学   17599篇
特种医学   9291篇
外科学   30256篇
综合类   2351篇
一般理论   5篇
预防医学   18622篇
眼科学   2870篇
药学   10126篇
中国医学   658篇
肿瘤学   17606篇
  2023年   100篇
  2022年   206篇
  2021年   368篇
  2020年   212篇
  2019年   305篇
  2018年   22215篇
  2017年   17584篇
  2016年   19734篇
  2015年   1254篇
  2014年   1241篇
  2013年   1346篇
  2012年   7888篇
  2011年   21902篇
  2010年   19241篇
  2009年   11911篇
  2008年   20201篇
  2007年   22417篇
  2006年   1205篇
  2005年   2885篇
  2004年   4014篇
  2003年   4916篇
  2002年   3031篇
  2001年   474篇
  2000年   593篇
  1999年   342篇
  1998年   333篇
  1997年   299篇
  1996年   189篇
  1995年   189篇
  1994年   161篇
  1993年   113篇
  1992年   136篇
  1991年   191篇
  1990年   232篇
  1989年   178篇
  1988年   143篇
  1987年   120篇
  1986年   111篇
  1985年   102篇
  1984年   72篇
  1983年   76篇
  1982年   56篇
  1980年   65篇
  1979年   40篇
  1974年   39篇
  1969年   36篇
  1968年   31篇
  1938年   61篇
  1932年   56篇
  1930年   46篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.

Aim  

The aim of this paper is to present two case reports of patients with hemangiomas of the external auditory canal, and to overview all cases published in English language literature so far.  相似文献   
993.
994.
995.
996.
With increasing rates of obesity and new diagnostic criteria for gestational diabetes mellitus (GDM), the overall prevalence of GDM is increasing worldwide. Women with GDM have an increased risk of maternal and fetal complications during pregnancy as well as long-term risks including higher prevalence of type 2 diabetes mellitus and cardiovascular disease. In recent years, the role of immune activation and inflammation in the pathogenesis of GDM has gained increasing attention. This monograph explores the current state of the literature as regards the expression of markers of inflammation in the maternal circulation, placenta, and adipose tissue of women with GDM.  相似文献   
997.
998.
999.
Familial cancer risk has been proposed as a shared feature of many cancers, and overall susceptibility is influenced by combinations of low to moderate risk polymorphisms, rare high penetrance germline mutations, and modulation of risk by environmental and genetic factors. Clustering of melanoma occurs in approximately 10 % of families, and an over-representation of additional cancers has been noticed in some ‘melanoma’ families. The degree to which other cancers aggregate in families affected by melanoma has not been well defined. Therefore, this study aimed to assess the risk of cancers other than melanoma in a cohort of 178 ‘intermediate risk’ melanoma families, not selected for specific genetic mutations. Families designated as ‘intermediate risk’ had two first degree relatives (FDRs) affected by melanoma when ascertained between 1982 and 1990, and were followed up over a 33 year period to assess new occurrences of cancer. We included 414 melanoma cases and 529 FDRs, comprising 25,264 person years of observation. Standardised incidence ratios and their 95 % confidence intervals were calculated for all invasive cancers, comparing observed to expected cases of cancer based on age and sex specific incidence rates for the Queensland population. Statistically significant increases were found for bladder cancer in females (observed, 7; expected, 1.99; SIR, 3.52; 95 % CI 1.41–7.25), lymphoid leukaemia in females (observed, 6; expected, 1.75; SIR, 3.43; 95 % CI 1.26–7.46), and myeloma in female melanoma cases (observed, 4; expected, 0.82; SIR, 4.89; 95 % CI 1.33–12.52). Over-representation of bladder cancer, lymphoid leukaemia, and myeloma in females of the cohort may suggest sex-dependent co-modifiers, and it is possible that specific combinations of polymorphisms predispose to certain cancer types.  相似文献   
1000.
This document is an update of the British Sarcoma Group guidelines published in 2010. The aim is to provide a reference standard for the clinical care of patients in the UK with bone sarcomas. Recent recommendations by the European Society of Medical Oncology, The National Comprehensive Cancer Network and The National Institute for Health and Care Excellence have been incorporated, and the literature since 2010 reviewed. The standards represent a consensus amongst British Sarcoma Group members in 2015. It is acknowledged that these guidelines will need further updates as care evolves. The key recommendations are that bone pain or a palpable mass should always lead to further investigation and that patients with clinico-radiological findings suggestive of a primary bone tumour at any site in the skeleton should be referred to a specialist centre and managed by a fully accredited bone sarcoma multidisciplinary team. Treatment recommendations are provided for the major tumour types and for localised, metastatic and recurrent disease. Follow up schedules are suggested.  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