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   1552544篇
  免费   112717篇
  国内免费   4753篇
耳鼻咽喉   19638篇
儿科学   50000篇
妇产科学   41233篇
基础医学   229242篇
口腔科学   41210篇
临床医学   147496篇
内科学   305764篇
皮肤病学   32000篇
神经病学   131918篇
特种医学   55046篇
外国民族医学   450篇
外科学   211190篇
综合类   29791篇
现状与发展   1篇
一般理论   527篇
预防医学   134508篇
眼科学   33090篇
药学   114369篇
  6篇
中国医学   3830篇
肿瘤学   88705篇
  2021年   14978篇
  2019年   15734篇
  2018年   24454篇
  2017年   17560篇
  2016年   18029篇
  2015年   20340篇
  2014年   26699篇
  2013年   41195篇
  2012年   59507篇
  2011年   62191篇
  2010年   34878篇
  2009年   31134篇
  2008年   55712篇
  2007年   58864篇
  2006年   57884篇
  2005年   56189篇
  2004年   53313篇
  2003年   50313篇
  2002年   48410篇
  2001年   65409篇
  2000年   67206篇
  1999年   56427篇
  1998年   15628篇
  1997年   14099篇
  1996年   13863篇
  1995年   13142篇
  1994年   12233篇
  1993年   11472篇
  1992年   44089篇
  1991年   43040篇
  1990年   41613篇
  1989年   39378篇
  1988年   36462篇
  1987年   35473篇
  1986年   33813篇
  1985年   32152篇
  1984年   24152篇
  1983年   20562篇
  1982年   12303篇
  1979年   21820篇
  1978年   15514篇
  1977年   12747篇
  1976年   12435篇
  1975年   12797篇
  1974年   15635篇
  1973年   15322篇
  1972年   14171篇
  1971年   13232篇
  1970年   12220篇
  1969年   11167篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
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   
102.

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   
103.
104.
105.
106.
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   
107.
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   
108.
109.
Bowel diseases of prematurity, including necrotizing enterocolitis, are dreaded ailments of neonates. Early diagnosis is difficult, with clinical and radiographic findings often inconclusive. We present a novel use of contrast-enhanced ultrasound in detection of pediatric bowel disease. Early identification of compromised blood flow or an at-risk bowel can be quantitatively detected and monitored. This ability has implications for guidance of emerging therapies, allowing targeting of inflammation. These findings represent an advancement in detection of bowel disease in neonates.  相似文献   
110.
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