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   5565篇
  免费   356篇
  国内免费   13篇
耳鼻咽喉   104篇
儿科学   280篇
妇产科学   79篇
基础医学   583篇
口腔科学   80篇
临床医学   444篇
内科学   1234篇
皮肤病学   103篇
神经病学   349篇
特种医学   125篇
外科学   1034篇
综合类   91篇
一般理论   3篇
预防医学   329篇
眼科学   219篇
药学   505篇
中国医学   20篇
肿瘤学   352篇
  2023年   51篇
  2022年   100篇
  2021年   213篇
  2020年   126篇
  2019年   170篇
  2018年   207篇
  2017年   133篇
  2016年   169篇
  2015年   170篇
  2014年   245篇
  2013年   267篇
  2012年   375篇
  2011年   369篇
  2010年   231篇
  2009年   203篇
  2008年   329篇
  2007年   379篇
  2006年   376篇
  2005年   310篇
  2004年   287篇
  2003年   263篇
  2002年   213篇
  2001年   91篇
  2000年   57篇
  1999年   49篇
  1998年   51篇
  1997年   28篇
  1996年   40篇
  1995年   17篇
  1994年   22篇
  1993年   25篇
  1992年   25篇
  1991年   28篇
  1990年   22篇
  1989年   25篇
  1988年   34篇
  1987年   31篇
  1986年   23篇
  1985年   14篇
  1984年   19篇
  1983年   10篇
  1982年   8篇
  1981年   9篇
  1980年   12篇
  1977年   9篇
  1975年   13篇
  1973年   11篇
  1972年   9篇
  1971年   8篇
  1970年   17篇
排序方式: 共有5934条查询结果,搜索用时 15 毫秒
91.
In tetralogy of Fallot septal defect is usually large because of malalignment of outlet septum, restrictive defect has been reported rarely. We present a case of tetralogy of Fallot with accessory tricuspid leaflet tissue restricting ventricular septal defect. The report includes echocardiographic and catheter images of this rare presentation of tetralogy of Fallot.  相似文献   
92.
93.
Pneumosinus dilatans (PD) represents a rare lesion of unknown etiology in which progressive enlargement of an air-filled paranasal sinus results in cosmetic and functional complications. The absence of pathologic mucosa has traditionally been considered a hallmark of this disorder. A 24-year-old man presented with 2 years of chronic rhinosinusitis and recurrent, acute episodes of severe forehead pain with worsening outward prominence of the frontal sinus during air travel. Computed tomography and findings at surgery were notable for diffuse nonpolypoid inflammatory changes of the paranasal sinuses, a type III frontal sinus cell, and PD of the frontal sinus with severe deformity and thinning of the anterior table. A bicoronal approach was used for frontal sinus obliteration and cranioplasty. Excellent cosmetic and functional results were noted at the last follow-up. To our knowledge, this is the first report of PD frontalis presenting in the setting of chronic rhinosinusitis. Surgical management of this disorder requires consideration of both the functional and cosmetic issues.  相似文献   
94.
95.
96.
97.
98.
99.

Objectives

The increase in the routine use of abdominal imaging has led to a parallel surge in the identification of polypoid lesions in the gallbladder. True gallbladder polyps (GBP) have malignant potential and surgery can prevent or treat early gallbladder cancer. In an era of constraint on health care resources, it is important to ensure that surgery is offered only to patients who have appropriate indications. The aim of this study was to assess treatment and surveillance policies for GBP among hepatobiliary and upper gastrointestinal tract surgeons in the UK in the light of published evidence.

Methods

A questionnaire on the management of GBP was devised and sent to consultant surgeon members of the Association of Upper Gastrointestinal Surgeons (AUGIS) of Great Britain and Ireland with the approval of the AUGIS Committee. It included eight questions on indications for laparoscopic cholecystectomy and surveillance based on GBP (size, number, growth rate) and patient (age, comorbidities, ethnicity) characteristics.

Results

A total of 79 completed questionnaires were returned. The vast majority of surgeons (>75%) stated that they would perform surgery when a single GBP reached 10 mm in size. However, there was a lack of uniformity in the management of multiple polyps and polyp growth rate, with different surveillance protocols for patients treated conservatively.

Conclusions

Gallbladder polyps are a relatively common finding on abdominal ultrasound scans. The survey showed considerable heterogeneity among surgeons regarding treatment and surveillance protocols. Although no randomized controlled trials exist, national guidelines would facilitate standardization, the formulation of an appropriate algorithm and appropriate use of resources.  相似文献   
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