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   1575570篇
  免费   114106篇
  国内免费   4802篇
耳鼻咽喉   19957篇
儿科学   50967篇
妇产科学   41929篇
基础医学   232534篇
口腔科学   42060篇
临床医学   148918篇
内科学   311291篇
皮肤病学   33343篇
神经病学   133799篇
特种医学   55125篇
外国民族医学   471篇
外科学   214430篇
综合类   29864篇
现状与发展   1篇
一般理论   532篇
预防医学   136352篇
眼科学   33542篇
药学   115893篇
  6篇
中国医学   3921篇
肿瘤学   89543篇
  2021年   15651篇
  2019年   16467篇
  2018年   23944篇
  2017年   17287篇
  2016年   18308篇
  2015年   20806篇
  2014年   27486篇
  2013年   42225篇
  2012年   61006篇
  2011年   63804篇
  2010年   35782篇
  2009年   32131篇
  2008年   56871篇
  2007年   60119篇
  2006年   59183篇
  2005年   57552篇
  2004年   54455篇
  2003年   51448篇
  2002年   49530篇
  2001年   66365篇
  2000年   68011篇
  1999年   57217篇
  1998年   15955篇
  1997年   14354篇
  1996年   14069篇
  1995年   13341篇
  1994年   12385篇
  1993年   11609篇
  1992年   44362篇
  1991年   43369篇
  1990年   41879篇
  1989年   39587篇
  1988年   36657篇
  1987年   35681篇
  1986年   33999篇
  1985年   32342篇
  1984年   24308篇
  1983年   20688篇
  1982年   12401篇
  1979年   21924篇
  1978年   15594篇
  1977年   12793篇
  1976年   12510篇
  1975年   12889篇
  1974年   15745篇
  1973年   15420篇
  1972年   14266篇
  1971年   13339篇
  1970年   12338篇
  1969年   11279篇
排序方式: 共有10000条查询结果,搜索用时 265 毫秒
101.
102.
Annals of Nuclear Medicine - The Response Evaluation Criteria In Solid Tumors (RECIST) is the most used radiological method for evaluating response after peptide receptor radionuclide therapy...  相似文献   
103.

Objective

The “Centre Hospitalier Francois Dunan” is located on an isolated island and ensures patients care in hemodialysis thanks to telemedicine support. Many research studies have demonstrated the importance of hemodialysis fluids composition to reduce morbidity in patients on chronic hemodialysis. The aim of this study was to identify the risks inherent in the production of dialysis fluids in a particular context, in order to set up an improvement action plan to improve risk control on the production of dialysis fluids.

Methods

The risk analysis was conducted with the FMECA methodology (Failure Mode, Effects and Criticality Analysis) by a multi professional work group. Three types of risk have been reviewed: technical risks that may impact the production of hemodialysis fluids, health risks linked with chemical composition and health risks due to microbiological contamination of hemodialysis fluids.

Results

The work group, in close cooperation with the expert staff of the dialysis center providing telemedicine assistance, has developed an action plan in order to improve the control of the main risks brought to light by the risk analysis.

Conclusion

The exhaustive analysis of the risks and their prioritisation have permitted to establish a relevant action plan in this improving quality of dialysis fluids approach. The risk control of dialysis fluids is necessary for the security of dialysis sessions for patients, even more when these sessions are realized by telemedicine in Saint-Pierre-et-Miquelon.  相似文献   
104.
To evaluate the changes in alveolar contour after guided bone regeneration (GBR) with two different combinations of biomaterials in dehiscence defects arou  相似文献   
105.
106.
107.
108.
109.
Porocarcinoma is an unusual, locally aggressive and potentially fatal neoplasm. Several cutaneous malignancies have been described in association with porocarcinoma, including squamous cell carcinoma, basal cell carcinoma and tricholemmal carcinoma. Previous reports have indicated that the occurrence of malignant tumours in combination with porocarcinoma is extremely rare, in particular with regard to Bowen disease (BD). We report an uncommon case of porocarcinoma occurring synchronously in a single BD lesion in a 63‐year‐old woman with multiple BD lesions. The clinical and histological findings confirmed this diagnosis.  相似文献   
110.
Reactive lymphoid infiltrates of the skin composed predominantly of gamma‐delta (γδ) T cells are not well described in the literature. Herein we report a case of an otherwise healthy 4‐year‐old male who presented with a waxing and waning papular rash characterized by small, discrete crusted papules spread across his trunk, face and extremities. Clinical evaluation revealed no evidence of systemic disease. Microscopic examination revealed a dermal, perivascular infiltrate of highly atypical lymphocytes with a γδ T cell phenotype, worrisome for primary cutaneous γδ T cell lymphoma. The clinical course, however, was that of a reactive condition and prompted consideration of a diagnosis of pityriasis lichenoides et varioliformis acuta (PLEVA) and lymphomatoid papulosis (LyP). In many ways, this case defies current classification schemes and seems to expand the spectrum of reactive γδ T cell infiltrates of the skin.  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