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   8064篇
  免费   516篇
  国内免费   72篇
耳鼻咽喉   153篇
儿科学   265篇
妇产科学   115篇
基础医学   961篇
口腔科学   362篇
临床医学   539篇
内科学   1943篇
皮肤病学   248篇
神经病学   703篇
特种医学   335篇
外科学   1092篇
综合类   81篇
一般理论   1篇
预防医学   273篇
眼科学   95篇
药学   559篇
中国医学   19篇
肿瘤学   908篇
  2023年   41篇
  2022年   69篇
  2021年   107篇
  2020年   71篇
  2019年   78篇
  2018年   155篇
  2017年   132篇
  2016年   137篇
  2015年   155篇
  2014年   202篇
  2013年   276篇
  2012年   289篇
  2011年   273篇
  2010年   231篇
  2009年   210篇
  2008年   285篇
  2007年   354篇
  2006年   356篇
  2005年   373篇
  2004年   327篇
  2003年   317篇
  2002年   299篇
  2001年   302篇
  2000年   261篇
  1999年   255篇
  1998年   207篇
  1997年   153篇
  1996年   165篇
  1995年   132篇
  1994年   135篇
  1993年   96篇
  1992年   194篇
  1991年   171篇
  1990年   186篇
  1989年   171篇
  1988年   166篇
  1987年   182篇
  1986年   145篇
  1985年   158篇
  1984年   106篇
  1983年   83篇
  1982年   56篇
  1981年   43篇
  1980年   53篇
  1979年   68篇
  1978年   41篇
  1977年   44篇
  1976年   36篇
  1975年   41篇
  1974年   39篇
排序方式: 共有8652条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
Postoperative empyema and aspergillosis were diagnosed in a 66-year-old man. Since non-operative therapy was not effective, we performed surgery. On the 8th postoperative day, a covered Ultraflex expandable stent (Boston Scientific, Galway, Ireland) was implanted to make a one-way airway for blocking a major air leak from a bronchopleural fistula causing respiratory distress. His general condition improved gradually, and he was discharged 30 days after stenting. In conclusion, we used a covered Ultraflex expandable stent to make an airway to block an air leak. This may be a new application for this stent.  相似文献   
6.
We report the case of a patient with a 13-year history of pemphigus vulgaris (PV) treated with immunosuppressive agents, prednisone and mycophenolate mofetil who had developed lesions of Kaposi's sarcoma (KS) on a sole plaque of PV that had been previously treated with intralesional injections of steroids. The lesions were surgically removed and polymerase chain reaction (PCR) demonstrated human herpesvirus-8 (HHV-8) DNA. There were neither recurrences nor later dissemination of KS following gradual decrease of the immunosuppressive therapy. We suggest that the treatment with intralesional steroids may have influenced the local reactivation of a latent infection of the virus, determining the appearance of this localized KS.  相似文献   
7.
8.
A new macrolide antibiotic, clarithromycin (TE-031, A-56268), was studied for its clinical efficacy in the field of pediatrics. Patients treated were infants and children ranging from 2 months to 11 years old suffering from acute bronchitis in 5 cases, acute tonsillitis in 2 cases, Mycoplasma pneumonia in 2 cases, pertussis in 6 cases, scarlatina in 1 case and acute enteritis in 2 cases, a total of 18 cases. TE-031 was administered 19.7-43.5 mg/kg in daily doses and lengths of treatment ranged from 4 to 19 days. As regards to its clinical efficacy, good or excellent results were obtained in all cases: excellent in 11 cases and good in 7 cases. No clinical side effects nor abnormal laboratory test values obviously attributable to TE-031 were observed.  相似文献   
9.
We investigated the clinical background of patients at Shin-Kokura Hospital who showed a positive culture of pleural effusion during the period from January 1998 through December 2002. Microorganism cultures of the pleural effusions of 127 patients were performed in this 5-year period. Seventeen patients showed a positive microorganism culture from a pleural effusion, and 12 of these patients (70.6%) were 60 years old or more. Ten patients were diagnosed with thoracic empyema. Thirteen patients had an underlying disease such as malignancy (5 cases), diabetes mellitus (4 cases), etc. A purulent effusion and a high concentration of lactic dehydrogenase (LDH) in the pleural fluid were more frequently recognized in the positive-culture group. A total of 21 strains of microorganism were isolated from the 17 patients, including 10 strains of Gram-positive cocci, 6 strains of Gram-negative bacilli, 3 strains of anaerobes, 1 strain of mycobacterium (Mycobacterium tuberculosis), and 1 strain of fungus. Susceptibility to antimicrobial agents was generally good for most of the microorganisms isolated. Of the 17 patients, chest-tube drainage was performed in 13, and 6 needed a surgical operation. Twelve patients improved, but 5 died. In this study, thoracic empyema accounted for 58.8% of the 17 cases with a positive culture of pleural effusion. Of the 10 thoracic empyema patients, 5 patients needed surgical treatment in spite of adequate antimicrobial treatment and chest-tube drainage. Our data indicate that thoracic empyema is still difficult to treat, and thus adequate and rapid treatment is needed for any pleural infection.  相似文献   
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