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   147892篇
  免费   32407篇
  国内免费   2389篇
耳鼻咽喉   5168篇
儿科学   5333篇
妇产科学   2412篇
基础医学   2908篇
口腔科学   1492篇
临床医学   26506篇
内科学   46859篇
皮肤病学   7388篇
神经病学   14633篇
特种医学   6313篇
外科学   40714篇
综合类   228篇
现状与发展   72篇
预防医学   6894篇
眼科学   3311篇
药学   854篇
中国医学   6篇
肿瘤学   11597篇
  2024年   512篇
  2023年   4775篇
  2022年   1163篇
  2021年   3041篇
  2020年   5998篇
  2019年   2119篇
  2018年   7336篇
  2017年   7299篇
  2016年   8371篇
  2015年   8362篇
  2014年   15417篇
  2013年   15525篇
  2012年   5335篇
  2011年   5341篇
  2010年   10270篇
  2009年   14167篇
  2008年   5673篇
  2007年   3899篇
  2006年   6365篇
  2005年   3656篇
  2004年   2917篇
  2003年   1910篇
  2002年   1996篇
  2001年   3779篇
  2000年   2991篇
  1999年   3195篇
  1998年   3626篇
  1997年   3449篇
  1996年   3356篇
  1995年   3200篇
  1994年   1937篇
  1993年   1563篇
  1992年   1380篇
  1991年   1416篇
  1990年   1066篇
  1989年   1189篇
  1988年   1018篇
  1987年   866篇
  1986年   888篇
  1985年   725篇
  1984年   554篇
  1983年   524篇
  1982年   514篇
  1981年   399篇
  1980年   360篇
  1979年   310篇
  1978年   329篇
  1977年   397篇
  1975年   277篇
  1972年   303篇
排序方式: 共有10000条查询结果,搜索用时 93 毫秒
971.
972.
973.
974.
975.
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   
976.
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   
977.
978.
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   
979.
980.
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