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   29476篇
  免费   1450篇
  国内免费   183篇
耳鼻咽喉   251篇
儿科学   658篇
妇产科学   383篇
基础医学   3921篇
口腔科学   551篇
临床医学   1787篇
内科学   7790篇
皮肤病学   720篇
神经病学   2605篇
特种医学   1105篇
外科学   4933篇
综合类   142篇
预防医学   692篇
眼科学   736篇
药学   1760篇
中国医学   47篇
肿瘤学   3028篇
  2023年   138篇
  2022年   265篇
  2021年   592篇
  2020年   334篇
  2019年   455篇
  2018年   624篇
  2017年   461篇
  2016年   549篇
  2015年   583篇
  2014年   867篇
  2013年   971篇
  2012年   1643篇
  2011年   1823篇
  2010年   1011篇
  2009年   904篇
  2008年   1593篇
  2007年   1770篇
  2006年   1725篇
  2005年   1908篇
  2004年   1863篇
  2003年   1906篇
  2002年   1760篇
  2001年   493篇
  2000年   473篇
  1999年   506篇
  1998年   468篇
  1997年   377篇
  1996年   349篇
  1995年   308篇
  1994年   290篇
  1993年   248篇
  1992年   334篇
  1991年   307篇
  1990年   276篇
  1989年   276篇
  1988年   266篇
  1987年   211篇
  1986年   213篇
  1985年   222篇
  1984年   196篇
  1983年   156篇
  1982年   106篇
  1981年   102篇
  1980年   96篇
  1979年   126篇
  1978年   89篇
  1977年   90篇
  1976年   84篇
  1973年   78篇
  1972年   77篇
排序方式: 共有10000条查询结果,搜索用时 312 毫秒
1.
International Journal of Clinical Oncology - The practice of cancer diagnosis disclosure to children has been changed with the times. The regulations of clinical trials in the 2000s might change...  相似文献   
2.
3.
Finasteride is standard medical treatment for androgenetic alopecia; however, no large studies with 5 years or more of follow up have been performed in Japan. The authors followed Japanese men with androgenetic alopecia treated with finasteride for 5 years to evaluate long‐term treatment efficacy. Of 903 men treated with finasteride (1 mg/day), 801 patients were evaluated over 5 years by modified global photographic assessment. Although the proportion of improvement was high (99.4%), modified global photographic assessment scores after 5 years of treatment were lower in patients with more advanced disease as measured by the modified Norwood–Hamilton scale. After separating patients into “sufficient” and “insufficient” efficacy groups according to the modified global photographic assessment score after 5 years (scores ≥6 and <6, respectively), multivariate analysis showed that independent risk factors of insufficient efficacy were age at start of treatment of 40 years or more (P = 0.021) and classification on the modified Norwood–Hamilton scale (P < 0.001), whereas presence of stress at start of treatment was a negative predictor (P = 0.025). In conclusion, continuous finasteride treatment for 5 years improved androgenetic alopecia with sustained effect among Japanese. Younger age and less advanced disease at start of treatment were the key predictors of higher finasteride efficacy.  相似文献   
4.
5.
Seven patients with advanced lateral oropharyngeal cancer (T3N2bM0, or T4N2bM0) underwent transoral lateral oropharyngectomy (TLO) with reconstruction performed through set-back tongue flap and polyglycolic acid (PGA) sheet. TLO was performed following en bloc resection of tumors using endoscopy. To cover the resulting defect in the lateral oropharyngeal wall, the set-back tongue flap was moved posteriorly and laterally to the area of the tongue base and lateral pharyngeal wall. The tip of the set-back tongue flap was sutured to the lateral pharynx to reconstruct the elevated tongue base and altered anterior pillar. The defect on the floor of the mouth was reconstructed using a PGA sheet. Following surgery, the mean observation period was 24 months. The mean operating time was 4 h and 2 min, with an average blood loss of 68.1 ml. All oral intake resumed on the first postoperative day via gastric tube. The mean gastric tube removal time was 1.6 postoperative days as a result of sufficient oral intake. None of the patients received postoperative radiotherapy or displayed evidence of tumor recurrence. We conclude that this novel procedure is highly effective for treating advanced oropharyngeal cancer as it demonstrates good prognostic and functional outcomes.  相似文献   
6.
Purpose: Small pulmonary lesions that include ground-glass attenuation have been increasingly discovered because of progressive imaging diagnostic technologies. Despite the detection of such small lesions, sometimes it is quite difficult to localize them because of their size or considerable depth from the visceral pleura. In the present study, we examined the usefulness of computed tomography-guided lipiodol marking for thoracoscopic resection of impalpable pulmonary nodules.Methods: Fifty-six patients with an undiagnosed peripheral lesion(s) of the lung who had undergone preoperative computed tomography-guided lipiodol marking followed by video-assisted thoracoscopic surgery were studied.Results: All of the nodules were successfully marked by computed tomography-guided lipiodol marking, and all except for one case were localized by means of intraoperative fluoroscopy as clear spots. With regard to complications, pneumothorax occurred in 21 patients (37.5%), and only one patient required transient drainage. Although hemorrhaging in the lung parenchyma and hemosputum occurred in nine patients (16.1%) and one patient (1.8%), respectively, no patients were in serious condition. No intra- or postoperative mortality or morbidity was observed.Conclusion: Preoperative computed tomography-guided lipiodol marking of small or impalpable pulmonary nodules is a safe and useful procedure for thoracoscopic resection of the lung.  相似文献   
7.
Journal of Neurology -  相似文献   
8.
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