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   262115篇
  免费   12018篇
  国内免费   880篇
耳鼻咽喉   3361篇
儿科学   7479篇
妇产科学   6668篇
基础医学   36834篇
口腔科学   8665篇
临床医学   17085篇
内科学   60755篇
皮肤病学   7585篇
神经病学   21879篇
特种医学   6731篇
外国民族医学   30篇
外科学   32575篇
综合类   1247篇
一般理论   46篇
预防医学   26349篇
眼科学   5978篇
药学   18850篇
中国医学   946篇
肿瘤学   11950篇
  2023年   1413篇
  2022年   2360篇
  2021年   5451篇
  2020年   3013篇
  2019年   5215篇
  2018年   7506篇
  2017年   4818篇
  2016年   5086篇
  2015年   5608篇
  2014年   7211篇
  2013年   10406篇
  2012年   16255篇
  2011年   16782篇
  2010年   9001篇
  2009年   7523篇
  2008年   14002篇
  2007年   14762篇
  2006年   14148篇
  2005年   13878篇
  2004年   12746篇
  2003年   11810篇
  2002年   11248篇
  2001年   7100篇
  2000年   7564篇
  1999年   6215篇
  1998年   1810篇
  1997年   1350篇
  1996年   1248篇
  1995年   1124篇
  1992年   3247篇
  1991年   2998篇
  1990年   2946篇
  1989年   2553篇
  1988年   2366篇
  1987年   2201篇
  1986年   2235篇
  1985年   2084篇
  1984年   1555篇
  1983年   1346篇
  1979年   1629篇
  1978年   1113篇
  1975年   1188篇
  1974年   1456篇
  1973年   1483篇
  1972年   1383篇
  1971年   1332篇
  1970年   1272篇
  1969年   1334篇
  1968年   1315篇
  1967年   1182篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.

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   
22.
23.
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   
24.
Hailey–Hailey disease (HHD), also known as benign familial pemphigus, is an autosomal dominant skin condition that affects the adhesion of epidermal keratinocytes. Although the initial manifestation of flaccid vesicles on erythematous or normal skin in flexure sites frequently goes unnoticed, large, macerated, exudative plaques of superficial erosions with crusting are observed at the time of diagnosis. There is no specific treatment for HHD, and most cases are symptomatically supported. However, infrared laser ablation has been somewhat helpful. We present a case successfully treated with fractional CO2 laser showing a long-term favourable outcome and no adverse effects. Thus, this modality could be an alternative to full ablation for this condition.  相似文献   
25.
26.
Gangliocytic paragangliomas are rare tumors that almost exclusively occur within the second portion of the duodenum. Although these tumors generally have a benign clinical course, they have the potential to recur or metastasize to regional lymph nodes. The case report presented here describes a 57-year-old female patient with melena, progressive asthenia, anemia, and a mass in the second-third portion of the duodenum that was treated by local excision. The patient was diagnosed with a friable bleeding tumor. The histologic analysis showed that the tumor was a 4 cm gangliocytic paraganglioma without a malignant cell pattern. In the absence of local invasion or distant metastasis, endoscopic resection represents a feasible, curative therapy. Although endoscopic polypectomy is currently considered the treatment of choice, it is not recommended if the size of the tumor is > 3 cm and/or there is active or recent bleeding. Patients diagnosed with a gangliocytic paraganglioma should be closely followed-up for possible local recurrence.  相似文献   
27.
28.
29.
30.
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