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   23046篇
  免费   1147篇
  国内免费   252篇
耳鼻咽喉   252篇
儿科学   480篇
妇产科学   667篇
基础医学   2607篇
口腔科学   523篇
临床医学   1702篇
内科学   6181篇
皮肤病学   401篇
神经病学   2490篇
特种医学   889篇
外科学   3655篇
综合类   46篇
一般理论   4篇
预防医学   904篇
眼科学   281篇
药学   1350篇
  1篇
中国医学   48篇
肿瘤学   1964篇
  2024年   62篇
  2023年   214篇
  2022年   403篇
  2021年   739篇
  2020年   460篇
  2019年   523篇
  2018年   687篇
  2017年   556篇
  2016年   639篇
  2015年   714篇
  2014年   927篇
  2013年   1119篇
  2012年   1766篇
  2011年   1791篇
  2010年   1011篇
  2009年   994篇
  2008年   1618篇
  2007年   1598篇
  2006年   1454篇
  2005年   1382篇
  2004年   1350篇
  2003年   1211篇
  2002年   1072篇
  2001年   151篇
  2000年   118篇
  1999年   163篇
  1998年   184篇
  1997年   165篇
  1996年   166篇
  1995年   126篇
  1994年   85篇
  1993年   95篇
  1992年   91篇
  1991年   68篇
  1990年   63篇
  1989年   77篇
  1988年   50篇
  1987年   64篇
  1986年   52篇
  1985年   37篇
  1984年   55篇
  1983年   48篇
  1982年   35篇
  1981年   41篇
  1980年   42篇
  1979年   19篇
  1978年   14篇
  1977年   20篇
  1976年   14篇
  1974年   14篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
981.
We report an Italian family suffering from chilblain. Seven members over three generations affected, two of them presenting association with late contractural arachnodactyly. Inflammatory cutaneous lesions following exposure to cold or drop in temperature are called chilblain. Arachnodactyly is an hallmark of hereditary connective tissue disorders such as Marfan's syndrome and Beals' syndrome. The latter, showing joint congenital contractures, is called indeed congenital contractural arachnodactyly. We speculate that an underlying alteration in connective tissue could lead to the association between chilblain lesions and contractural arachnodactyly.  相似文献   
982.
983.
984.
985.
One of the first signs of facial ageing appears in the forehead, with the descent of the lateral part of the brow. This is a troubling condition for all patients and elevation of the lateral part of the brow becomes a more and more frequent demand. The authors present their experience in 350 consecutive cases of direct eyebrow lift (“butterfly wing” incision) alone or in combination with rhytidectomy and/or blepharoplasty. The majority of the patients were female (90%). The age ranged from 43 to 85 years. Eighty per cent of the cases were performed simultaneously with rhytidectomy and blepharoplasty, 16% were performed in association with blepharoplasty and eyebrow lift alone represented 4%. The most common complication was epidermal cyst (3.4%) and suture dehiscence (2%). The “butterfly wing” incision provides a useful alternative to correction of eyebrow ptosis. Indication for surgery is dependent more on the ageing signs than on the patient''s chronological age. The final results are consistently very gratifying to the patient and to the plastic surgeon alike.  相似文献   
986.
987.
988.
989.
Abstract: Introduction: Aortoiliac pathology in kidney allograft recipients is not rare but treatment timing is controversial. As most publications on this topic are case reports it’s difficult to evaluate long‐term outcomes of those clinical challenges. Herein we report long‐term results of these procedures. Methods: From 1970 to 2006, 1544 kidney transplants were performed in our center. Thirty patients underwent aortoiliac surgery simultaneously with kidney transplantation. We analyzed their clinical records to come up with outcomes of these complex clinical challenges. Results: Vascular pathology was distributed as following: 19 stenoses treated with endarterectomy (15), aortoiliac bypass (two), aorto‐bi‐iliac bypass (one) and aorto‐bifemoral bypass (one); and 11 aneurysms treated with arterioplasty (four), aorto‐bi‐iliac bypass (four) and iliac‐iliac bypass (three). In 24 cases (80%) the necessity of vascular surgery was established intraoperatively as vessels’ conditions did not permit safe anastomoses and jeopardized graft survival. Mean follow‐up was 59 months (12–125). Five (16.7%) grafts were lost and three (10%) patients died in the first post‐operative month: acute myocardial infarction (two) and non‐viable kidney (one). Three patients died six, seven and 10 yr after the procedure. Nineteen patients are currently well with functioning grafts. Conclusions: Surgical correction of aortoiliac pathology may be performed simultaneously with kidney transplantation with acceptable outcome. This complex surgery can be performed in centers with experienced vascular surgeons. Specific vascular imaging should be performed regularly on patient at risk of aortoiliac disease before insertion and while on waiting list.  相似文献   
990.

Drug refractory chronic daily headache (CDH) is a highly disabling condition. CDH is usually regarded as the negative evolution of chronic migraine (CM) and is characterized by high prevalence of psychiatric disorders, especially mood disorders. Vagal nerve stimulation (VNS) is an established treatment option for selected patients with medically refractory epilepsy and depression. Neurobiological similarities suggest that VNS could be useful in the treatment of drug-refractory CM associated with depression. The aim of the study was to evaluate the efficacy of VNS in patients suffering from drug-refractory CM and depressive disorder. We selected four female patients, mean age 53 (range 43–65 years), suffering from daily headache and drug-refractory CM. Neurological examination and neuroradiological investigations were unremarkable. Exclusion criteria were psychosis, heart and lung diseases. The preliminary results in our small case series support a beneficial effect of chronic VNS on both drug-refractory CM and depression, and suggest this novel treatment as a valid alternative for this otherwise intractable and highly disabling condition.

  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