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   2047433篇
  免费   149694篇
  国内免费   3138篇
耳鼻咽喉   29564篇
儿科学   64089篇
妇产科学   54272篇
基础医学   290122篇
口腔科学   58021篇
临床医学   178122篇
内科学   405820篇
皮肤病学   43833篇
神经病学   159679篇
特种医学   81255篇
外国民族医学   725篇
外科学   322856篇
综合类   42107篇
现状与发展   2篇
一般理论   576篇
预防医学   146968篇
眼科学   46032篇
药学   155127篇
  5篇
中国医学   4207篇
肿瘤学   116883篇
  2018年   20159篇
  2017年   15475篇
  2016年   17101篇
  2015年   19334篇
  2014年   26753篇
  2013年   40283篇
  2012年   55137篇
  2011年   58087篇
  2010年   34723篇
  2009年   33188篇
  2008年   56228篇
  2007年   59845篇
  2006年   60707篇
  2005年   58818篇
  2004年   57351篇
  2003年   55450篇
  2002年   54461篇
  2001年   107532篇
  2000年   111602篇
  1999年   94226篇
  1998年   23893篇
  1997年   21355篇
  1996年   21795篇
  1995年   20507篇
  1994年   19229篇
  1993年   17770篇
  1992年   73336篇
  1991年   71162篇
  1990年   69077篇
  1989年   66552篇
  1988年   61025篇
  1987年   59774篇
  1986年   55740篇
  1985年   53492篇
  1984年   39179篇
  1983年   33047篇
  1982年   18258篇
  1981年   16332篇
  1979年   34911篇
  1978年   23838篇
  1977年   20416篇
  1976年   18410篇
  1975年   20111篇
  1974年   23814篇
  1973年   22726篇
  1972年   21210篇
  1971年   19679篇
  1970年   18639篇
  1969年   17158篇
  1968年   15559篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
Haemophilia is a common cause of genetically inherited bleeding disorders. Pseudotumours occur in 1–2 % of persons with severe forms of haemophilia. These are a result of repeated haemorrhage into soft tissues, subperiosteum or a site of bone fracture with inadequate resorption of the extravasated blood. There are a number of therapeutic alternatives for this dangerous condition: surgical removal, percutaneous management, irradiation, embolization etc. In this case report, we describe the natural history, clinical course and successful surgical management of a patient with haemophilia who presented with a massive pseudotumour. We also briefly review the relevant literature on the various therapeutic modalities that have been implemented in the management of this rare complication. Though surgeons may be averse to operate on haemophiliacs, primary surgical management as done in our case may prove to be the definitive treatment option for such patients.  相似文献   
4.
5.
6.
Abstract

Objective: To understand the origin of extremely high gonadotropin levels in a perimenopausal woman.

Methods: A 52-year-old woman with a 2?months of amenorrhea followed spontaneous menstrual cycles recovery was referred to our outpatient clinic with elevated follicle-stimulating hormone (FSH, 483 mUI/ml), luteinizing hormone (LH, 475 mUI/ml) and prolactin (PRL, 173?ng/ml). She was known to take levosulpiride. The gonadotropin levels did not fit with the clinical features.

Results: A gonadotroph tumor was ruled out. Further analysis confirmed constantly high FSH, LH and PRL levels. The measurements were repeated using different analytical platforms with different results. After serial dilutions, nonlinearity was present suggesting an immunoassay interference. After post-polyethylene glycol recovery, hormone levels appeared in the normal range. Anti-goat antibodies were recognized in the serum of the patient.

Conclusions: This case report shows a case of falsely abnormal high gonadotropin and PRL levels in a woman during menopause transition. In the clinical practice the evaluation of gonadotropin profile is not recommended at this age, but the abnormal levels stimulated further evaluation. An interference in the assay due to anti-goat antibodies resulted in abnormally high level of FSH and LH. A strict collaboration between clinicians and the laboratory is needed, when laboratory findings do not correspond to clinical findings.  相似文献   
7.
8.
This study used the National Survey of Ambulatory Surgery (NSAS) database to measure the incidence of and risk factors for symptoms in the ambulatory surgery center and problems within 24 h after isolated carpal tunnel release (CTR). The NSAS contained records on 400,000 adult patients with carpal tunnel syndrome who were treated with CTR in 2006, based on ICD-9 codes. The type of anesthesia used and factors associated with symptoms and problems were sought in bivariate and multivariable statistical analyses. The mean duration of the procedure was 16 ± 8.8 min. Only 5 % were performed under local anesthesia without sedation, 45 % with IV sedation, 28 % regional anesthesia, and 19 % general anesthesia. Symptoms in the ambulatory surgery center or a problem within 24 h after discharge were recorded in 10 % of patients, all of them minor and transient, including difficulties with pain and its treatment. The strongest risk factors were male sex, age of 45 years and older, and participation of an anesthesiologist. Local anesthesia and regional anesthesia were associated with more perioperative symptoms and postoperative problems. Most CTR are performed with some sedation in the United States. CTR is a safe procedure: one in 10 patients will experience a minor issue in the perioperative or immediate postoperative period.  相似文献   
9.
10.
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