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   1196273篇
  免费   198801篇
  国内免费   30114篇
  1425188篇
  2018年   13260篇
  2017年   12535篇
  2016年   17003篇
  2015年   21587篇
  2014年   25285篇
  2013年   35398篇
  2012年   39457篇
  2011年   40618篇
  2010年   29644篇
  2009年   31545篇
  2008年   36990篇
  2007年   38159篇
  2006年   34791篇
  2005年   33681篇
  2004年   33305篇
  2003年   31782篇
  2002年   31535篇
  2001年   54777篇
  2000年   52663篇
  1999年   45209篇
  1998年   20271篇
  1997年   19725篇
  1996年   18491篇
  1995年   17856篇
  1994年   17044篇
  1993年   16728篇
  1992年   37403篇
  1991年   36378篇
  1990年   35855篇
  1989年   34841篇
  1988年   31996篇
  1987年   30146篇
  1986年   28096篇
  1985年   27768篇
  1984年   22782篇
  1983年   19514篇
  1982年   15457篇
  1981年   14054篇
  1980年   13240篇
  1979年   21249篇
  1978年   16841篇
  1977年   15413篇
  1976年   14482篇
  1975年   15630篇
  1974年   17195篇
  1973年   16836篇
  1972年   15633篇
  1971年   14196篇
  1970年   12437篇
  1969年   12122篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
92.
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   
93.
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   
94.
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   
95.
96.
97.
98.
99.
100.
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