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   1307篇
  免费   58篇
  国内免费   33篇
耳鼻咽喉   26篇
儿科学   62篇
妇产科学   19篇
基础医学   111篇
口腔科学   27篇
临床医学   130篇
内科学   359篇
皮肤病学   109篇
神经病学   35篇
特种医学   207篇
外科学   120篇
综合类   29篇
预防医学   77篇
眼科学   6篇
药学   32篇
中国医学   3篇
肿瘤学   46篇
  2019年   9篇
  2018年   7篇
  2017年   12篇
  2016年   17篇
  2015年   22篇
  2014年   25篇
  2013年   68篇
  2012年   15篇
  2011年   15篇
  2010年   49篇
  2009年   57篇
  2008年   22篇
  2007年   30篇
  2006年   27篇
  2005年   31篇
  2004年   13篇
  2003年   12篇
  2002年   21篇
  2001年   22篇
  2000年   14篇
  1999年   20篇
  1998年   83篇
  1997年   72篇
  1996年   76篇
  1995年   49篇
  1994年   62篇
  1993年   51篇
  1992年   14篇
  1991年   17篇
  1990年   21篇
  1989年   41篇
  1988年   42篇
  1987年   32篇
  1986年   26篇
  1985年   26篇
  1984年   23篇
  1983年   12篇
  1982年   21篇
  1981年   18篇
  1980年   13篇
  1979年   17篇
  1978年   14篇
  1977年   16篇
  1976年   16篇
  1975年   12篇
  1973年   14篇
  1972年   7篇
  1971年   7篇
  1965年   6篇
  1957年   7篇
排序方式: 共有1398条查询结果,搜索用时 15 毫秒
71.
72.
It is highly recommended to conduct a prophylactic check for any dental problems on patients who suffer from leukaemia before chemotherapy begins. Bacteraemia caused by oral microflora may be very dangerous for patients with haematological malignancies. However, it should be noted that the prophylactic process itself might bring about life-threatening complications if there is only a short interval between dental treatment and the beginning of chemotherapy, or if the dental treatment is too aggressive. We present a case where this prophylactic procedure produced life-threatening complications for a patient with acute myeloid leukaemia.  相似文献   
73.
In order to quantify presence of residual BCC in patients with histologic positive margins after the first excison and to correlate the presence of residual tumor in re‐excised lesions with the location of the positive margin on the first excision, a retrospective evaluation of 2053 surgically treated BCC was performed. Only 38.3% of the re‐excised lesions showed residual tumor. In the group of re‐excised lesions where residual BCC was found, 13% had lateral positive margin in the first excision, 39% had deep positive margin and 48% had both lateral and deep positive margins. In the group of re‐excised lesions where no residual BCC was found, 49% of the primary excised lesions had lateral positive margin, 32% had deep positive margin and 19% had both deep and lateral positive margins. The association between residual tumor and positive margins was statistically significant (p = 0.01). Our findings confirm that presence of residual tumour is more likely when both lateral and deep margins are compromised.  相似文献   
74.
75.
Pyroglutamic acid (PCA) was compared with placebo in a randomized, double blind trial for assessing its efficacy in treating memory deficits in 40 aged subjects. Twenty subjects were treated with PCA and 20 with placebo over a period of 60 d. Memory functions were evaluated at baseline and after 60 d of treatment by means of a battery made up of 6 memory tasks. The results suggest that PCA is effective in improving some verbal memory functions in subjects affected by age-related memory decline.  相似文献   
76.
77.
Park  JH; Choi  BI; Han  MC; Sung  KB; Choo  IW; Kim  CW 《Radiology》1987,163(3):619-623
In the Orient there is a high frequency of residual intrahepatic stones after biliary tract surgery. Percutaneous removal of residual intrahepatic stones was attempted in a group of 74 patients. Stones were exclusively intrahepatic in 57 patients, whereas 17 patients also had stones in the common bile duct. Biliary strictures were present in 60 cases (81%). A combination of techniques was used, including preshaped angulated catheters, irrigation-suction, balloon dilation of strictures, and crushing of large stones. In 36 cases all stones were removed and in 14 cases most stones were removed, for a success rate of 67.6%. Biliary stricture was the factor most often responsible for failure.  相似文献   
78.
79.
Splanchnic artery aneurysms and pseudoaneurysms: transcatheter embolization   总被引:9,自引:0,他引:9  
Baker  KS; Tisnado  J; Cho  SR; Beachley  MC 《Radiology》1987,163(1):135-139
Over the past 7 years, eight patients with splanchnic artery aneurysms and pseudoaneurysms were studied and treated. Transcatheter embolization resulted in occlusion of the lesions in all eight patients. Potentially risky and difficult surgery was avoided completely in four patients. Three patients had elective surgery at a later date when their condition was more stable. The remaining patient had definitive surgery after embolization. Transcatheter embolization should be the initial treatment of choice in splanchnic artery aneurysms and pseudoaneurysms.  相似文献   
80.
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