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   154943篇
  免费   32818篇
  国内免费   2432篇
耳鼻咽喉   5207篇
儿科学   5438篇
妇产科学   2505篇
基础医学   3913篇
口腔科学   1782篇
临床医学   27197篇
内科学   48384篇
皮肤病学   7539篇
神经病学   15255篇
特种医学   6590篇
外科学   41749篇
综合类   277篇
现状与发展   72篇
一般理论   4篇
预防医学   7296篇
眼科学   3469篇
药学   1503篇
中国医学   25篇
肿瘤学   11988篇
  2024年   522篇
  2023年   4819篇
  2022年   1263篇
  2021年   3202篇
  2020年   6104篇
  2019年   2274篇
  2018年   7482篇
  2017年   7448篇
  2016年   8529篇
  2015年   8537篇
  2014年   15686篇
  2013年   15793篇
  2012年   5818篇
  2011年   5831篇
  2010年   10531篇
  2009年   14413篇
  2008年   6123篇
  2007年   4333篇
  2006年   6809篇
  2005年   4096篇
  2004年   3309篇
  2003年   2297篇
  2002年   2344篇
  2001年   3862篇
  2000年   3054篇
  1999年   3265篇
  1998年   3716篇
  1997年   3524篇
  1996年   3421篇
  1995年   3249篇
  1994年   1984篇
  1993年   1597篇
  1992年   1410篇
  1991年   1453篇
  1990年   1089篇
  1989年   1219篇
  1988年   1047篇
  1987年   886篇
  1986年   915篇
  1985年   740篇
  1984年   578篇
  1983年   556篇
  1982年   541篇
  1981年   428篇
  1980年   371篇
  1979年   327篇
  1978年   339篇
  1977年   409篇
  1975年   288篇
  1972年   313篇
排序方式: 共有10000条查询结果,搜索用时 750 毫秒
991.
992.
993.
994.
This article is a retrospective study comparing the efficacy of Regnauld arthroplasty to first ray osteotomies for the treatment of hallux valgus. One hundred consecutive cases of Regnauld arthroplasties were compared with 100 consecutive first ray osteotomies. One hundred fourty-one patients were available for follow-up, and based on clinical/radiographic examinations, 72 were treated with the osteotomy protocol (group A) and 69 with Regnauld arthroplasty (group B). Age at surgery, clinical symptoms, and preoperative radiologic findings were similar for the 2 groups; there was a preponderance of female patients (90%). The average follow-up was 49 months in group A and 51 months in group B. Clinical evaluation showed in the osteotomy group a more stable correction (79% v 49%), greater pain reduction (measured in a visual analog scale from 0 = pain free to 10 = deep intolerable pain), increased residual articular excursion of the first metatarsophalangeal joint (27 degrees of active dorsiflexion from neutral position v 8 degrees ), and less presence of central metatarsalgia (15% v 34%) (P <.05). The radiographic evaluation expressed more stable correction values in group A for the following parameters: joint preservation, sesamoid position, intermetatarsal angle (7 degrees v 12 degrees ), abduction angle of the hallux (14 degrees v 20 degrees ), and proximal articular set angle (8 degrees v 18 degrees ) (P <.05).  相似文献   
995.
BACKGROUND: Although no randomized controlled trial has assessed the effects of either compression sclerotherapy or ambulatory phlebectomy, both techniques are used to treat varicose veins worldwide. We performed a randomized controlled trial to compare recurrence rates of varicose veins and complications after compression sclerotherapy and ambulatory phlebectomy. METHODS: From September 1996 to October 1998, we randomly allocated 49 legs to compression sclerotherapy and 49 legs to ambulatory phlebectomy. Our primary outcome parameters were as follows: recurrence rates at 1 and 2 years and complications related to therapy. Eighty-two patients were included, of whom 16 were included with both of their legs. The number of treated legs was therefore 98, but two patients were lost to follow-up. RESULTS: One year recurrence amounted to 1 out of 48 for phlebectomy and 12 out of 48 for compression sclerotherapy (P<0.001); at 2 years, six additional recurrences were found, but then solely for compression sclerotherapy (P<0.001). Significant differences in complications occurring more in phlebectomy than in compression sclerotherapy therapy were blisters, teleangiectatic matting, scar formation, and bruising from bandaging. CONCLUSION: Our results show that ambulatory phlebectomy is an effective therapy for varicose veins of the leg. Recurrence rates are significantly lower than for compression sclerotherapy therapy. If varicose veins persist 4 weeks after compression sclerotherapy, it can be argued that to reduce the risk of future recurrence ambulatory phlebectomy should be considered as the better treatment option.  相似文献   
996.
997.
BACKGROUND: A venous lake is a venous ectasia that appears mostly on the lower lip and other sun-exposed areas of an older person. Treatment of lip venous lake includes surgical excision, laser therapy, infrared coagulation, and cryotherapy. Although the use of sclerotherapy on varicose veins, leg telangiectasia, hemorrhoids, and hemangiomas is well established, the use of sclerotherapy for lip venous lake has not been reported. OBJECTIVE: We present two cases of lip venous lake treated with intralesional injection of 1% polidocanol. METHOD: Two cases are reported, and literature is reviewed. RESULT: The lesions virtually disappeared, leaving an inconspicuous scar, with two sessions of sclerotherapy. Side effects were not observed. CONCLUSION: Sclerotherapy with polidocanol is effective in the treatment of lip venous lake and offers an alternative to conventional methods.  相似文献   
998.
999.
1000.
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