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   1134552篇
  免费   122668篇
  国内免费   629篇
  1257849篇
  2018年   10113篇
  2016年   13595篇
  2015年   17963篇
  2014年   21388篇
  2013年   31028篇
  2012年   34227篇
  2011年   35141篇
  2010年   23910篇
  2009年   22181篇
  2008年   31330篇
  2007年   32758篇
  2006年   30759篇
  2005年   29511篇
  2004年   29333篇
  2003年   28072篇
  2002年   27464篇
  2001年   48683篇
  2000年   48754篇
  1999年   38805篇
  1998年   13825篇
  1997年   14492篇
  1996年   13561篇
  1995年   12660篇
  1994年   12295篇
  1993年   12506篇
  1992年   32695篇
  1991年   31808篇
  1990年   31240篇
  1989年   30498篇
  1988年   28527篇
  1987年   27057篇
  1986年   25254篇
  1985年   25417篇
  1984年   21145篇
  1983年   18256篇
  1982年   14006篇
  1981年   12626篇
  1980年   12065篇
  1979年   20440篇
  1978年   15969篇
  1977年   14813篇
  1976年   13963篇
  1975年   15222篇
  1974年   16746篇
  1973年   16358篇
  1972年   15130篇
  1971年   13859篇
  1970年   12036篇
  1969年   11817篇
  1968年   11120篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
Argon laser surgery is an effective treatment for ectasias and congenital port-wine stains; however, its use in children under the age of 13 is controversial. This paper reviews 202 children under the age of 13 who underwent argon laser treatments for congenital port-wine stains, spider angiomas, epidermal nevi, and lentigines. The clinical characteristics of port-wine stains in 170 children are discussed. Good to excellent results (moderate to complete clearing) in port-wine stains were obtained in 60 percent of patients and seemed to correlate best with lack of blanchability on pressure. Hypertrophic scarring was seen in only 7 children, all of whom had undressed wounds; no significant scarring has been seen in any subsequent child who had maintained a dressed wound postoperatively.  相似文献   
83.
Reconstruction of bony structures of the face is always a problem as big as the defect and the function that must be replaced. Everything from simple grafts to sophisticated distant bone flaps has been used. Based on the studies of Cutting et al., Psillakis et al., and Casanova et al., we have developed the full-thickness galeoparietal bone flap, initially for mandibular reconstruction, but of great use for all maxillofacial reconstructions. From July of 1987 to December of 1988, 14 patients have been operated on. The experience with this flap is shown in four patients as follows: primary reconstruction of a mandible as a result of ameloblastoma, secondary reconstruction of a mandible with associated old fractures and malalignment of segments, bilateral malar reconstruction in a patient with Treacher Collins syndrome, and severe sequelae of an already treated Romberg case. Small variations could be made to best accommodate the technique used to the defect we were treating. Some technical details, the experience, the results, and possible sequelae or complications are also discussed.  相似文献   
84.
Trigger finger is a relatively common clinical entity, most frequently caused by stenosing tenosynovitis. Several other conditions not related to tenosynovitis also have been described as a cause of triggering, and these have been reviewed. We present a rare anomaly of the fourth lumbrical muscle insertion as a cause of triggering of the right little finger. This was completely relieved following excision of the anomalous muscle. This rare anatomic variant should be added to the list of potential causes of trigger finger.  相似文献   
85.
86.
87.
88.
89.
90.
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