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   2288038篇
  免费   167784篇
  国内免费   3363篇
耳鼻咽喉   31612篇
儿科学   75640篇
妇产科学   65796篇
基础医学   336670篇
口腔科学   64526篇
临床医学   205302篇
内科学   444134篇
皮肤病学   48485篇
神经病学   181553篇
特种医学   87336篇
外国民族医学   602篇
外科学   339018篇
综合类   48182篇
现状与发展   4篇
一般理论   823篇
预防医学   180142篇
眼科学   52296篇
药学   171418篇
  8篇
中国医学   4094篇
肿瘤学   121544篇
  2018年   22801篇
  2016年   19200篇
  2015年   22294篇
  2014年   30794篇
  2013年   47021篇
  2012年   64273篇
  2011年   68715篇
  2010年   40201篇
  2009年   38342篇
  2008年   65630篇
  2007年   70641篇
  2006年   70981篇
  2005年   69587篇
  2004年   66941篇
  2003年   64369篇
  2002年   63064篇
  2001年   100072篇
  2000年   102518篇
  1999年   86881篇
  1998年   25008篇
  1997年   22452篇
  1996年   22912篇
  1995年   21724篇
  1994年   20474篇
  1993年   18969篇
  1992年   70001篇
  1991年   69041篇
  1990年   67756篇
  1989年   65668篇
  1988年   61172篇
  1987年   60068篇
  1986年   57294篇
  1985年   54532篇
  1984年   41104篇
  1983年   35803篇
  1982年   21452篇
  1981年   19307篇
  1979年   39457篇
  1978年   28326篇
  1977年   24067篇
  1976年   22560篇
  1975年   24599篇
  1974年   29443篇
  1973年   28669篇
  1972年   27216篇
  1971年   25369篇
  1970年   23766篇
  1969年   22713篇
  1968年   21281篇
  1967年   18959篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Infections due to Penicillium species other than P.marneffei are rare. We identified a boy with X-linked chronic granulomatous disease (X-CGD) with a pulmonary nodule and adjacent rib osteomyelitis caused by Penicillium piceum. The only sign of infection was an elevated sedimentation rate. P. piceum was isolated by fine needle aspirate and from excised infected tissues. Surgical removal and one year of voriconazole treatment were very well tolerated and led to complete recovery. Microbiological, microscopic and molecular studies support the fungal diagnosis. P. piceum should be considered as a relevant pathogen in immunocompromised patients.  相似文献   
42.
Abstract: Background: Fetal pulse oximetry improves the assessment of fetal well‐being during labor. The objective of this study was to evaluate women's satisfaction with their experience with this additional technology. Methods: We surveyed women participating in the FOREMOST trial, a randomized controlled trial comparing the addition of fetal pulse oximetry (FPO) to conventional cardiotocograph (CTG) monitoring (intervention group), versus CTG‐only (control group), in the presence of nonreassuring fetal status during labor. Our survey evaluated 3 aspects of women's experience: labor, fetal monitoring, and participation in the research. The survey was administered within a few days of giving birth and repeated 3 months later. Results: No differences were found between the intervention and control groups for women's evaluations of their labor, fetal monitoring, research, or overall experiences when surveyed on both occasions. Within each study group, a small but statistically significant decline occurred in women's scores for their experience of labor and overall experience from the initial survey close to the time of giving birth, to 3 months later. The magnitude of differences in responses over time was similar for the both groups. Women were more satisfied after a spontaneous or assisted vaginal birth than after cesarean section. Length of time the research midwife was present had a significant positive effect on women's ratings of their experience several days after giving birth (p = 0.006), but no effect at 3 months. Conclusions: The addition of fetal pulse oximetry for the assessment of fetal well‐being during labor did not affect childbearing women's perceptions of fetal monitoring or their labor. Women evaluated their experience in the research process positively overall. Small changes occurred in women's perception of their satisfaction over time. (BIRTH 33:2 June 2006)  相似文献   
43.
44.
45.
We report the case of a 38-year-old woman who presented with chronic lower abdominal pain. Her past medical history included a splenectomy due to abdominal trauma. Ultrasound examination revealed four pelvic tumors which, upon laparotomy, were found to be the result of splenosis. Approximately 100 cases of splenosis have been reported but only a minority of them have been published in the gynecological literature. Our case indicates that those involved in pelvic scanning (even of asymptomatic women) and/or treating those complaining of lower abdominal pain or presenting with pelvic tumors should be aware of splenosis as a possible diagnosis.  相似文献   
46.
47.
48.
49.
Neu-Laxova syndrome (NLS) is a rare autosomal recessive syndrome, characterized by severe intrauterine growth retardation (IUGR), microcephaly, abnormal brain development, oedema and ichthyosis. It was first reported in 1971 by Neu et al. (Pediatrics 47: 610-612) and since then no more than 60 cases have been reported. A newborn girl delivered from a 29-year-old healthy mother was admitted to hospital with a thick membrane covering her body and dismorphic appearance. The diagnosis of NLS was made according to characteristic features. The syndrome is known to have a poor prognosis and the baby lived for 9 weeks. This case is one of the longest living cases of NLS and the fourth case reported from Turkey.  相似文献   
50.
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