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   2129篇
  免费   287篇
  国内免费   24篇
耳鼻咽喉   13篇
儿科学   78篇
妇产科学   37篇
基础医学   137篇
口腔科学   81篇
临床医学   319篇
内科学   528篇
皮肤病学   40篇
神经病学   78篇
特种医学   304篇
外科学   244篇
综合类   45篇
预防医学   313篇
眼科学   38篇
药学   76篇
中国医学   1篇
肿瘤学   108篇
  2023年   53篇
  2022年   27篇
  2021年   34篇
  2020年   51篇
  2019年   32篇
  2018年   63篇
  2017年   47篇
  2016年   59篇
  2015年   61篇
  2014年   114篇
  2013年   143篇
  2012年   69篇
  2011年   86篇
  2010年   85篇
  2009年   97篇
  2008年   69篇
  2007年   94篇
  2006年   74篇
  2005年   66篇
  2004年   60篇
  2003年   25篇
  2002年   34篇
  2001年   31篇
  2000年   38篇
  1999年   34篇
  1998年   74篇
  1997年   92篇
  1996年   79篇
  1995年   59篇
  1994年   63篇
  1993年   53篇
  1992年   21篇
  1991年   18篇
  1990年   34篇
  1989年   48篇
  1988年   42篇
  1987年   38篇
  1986年   41篇
  1985年   39篇
  1984年   16篇
  1983年   13篇
  1982年   28篇
  1981年   32篇
  1980年   18篇
  1979年   8篇
  1978年   5篇
  1977年   14篇
  1976年   15篇
  1975年   13篇
  1969年   5篇
排序方式: 共有2440条查询结果,搜索用时 15 毫秒
61.
This is the first part of a 3‐part comprehensive review of intraosseous carcinoma of the jaws. We have outlined 4 groups of intraosseous carcinoma of the jaws (metastatic, salivary‐type, odontogenic, and primary intraosseous carcinoma), emphasizing the need for accurate diagnosis and the problems associated with changing classification systems, standardization of diagnostic criteria and nomenclature, and the accuracy of existing literature. In this first part, the features of metastatic and the very rare salivary‐type carcinomas of the jaws are examined with particular emphasis on histologic and immunohistochemical characteristics, diagnostic difficulties, and uncertainties. © 2012 Wiley Periodicals, Inc. Head Neck, 2012  相似文献   
62.
63.
Glioblastoma multiforme (GBM) is the most aggressive malignant brain tumour. Having a second or subsequent operation at recurrence may be a positive prognostic factor for survival. Recent studies suggest that socio-demographic variables may influence survival, raising the question whether surgical care differs based on these variables. We examined the relationship between selected socio-demographic variables and the number of repeat operations undergone by patients with recurrent GBM. Data from all patients diagnosed with GBM between 2001 and 2011 was obtained from a clinical database maintained across two institutions (one public, one private). The clinical and socio-demographic factors for patients who received one operation were compared to those who had two or more operations, using chi-squared analyses to determine statistical differences between groups. Socioeconomic status was measured using the Index of Relative Socioeconomic Advantage and Disadvantage scores. Of 553 patients, 449 (81%) had one operation and 104 (19%) had ?2 operations. Patients who had ?2 operations were significantly younger (median 55 years versus 64 years, p < 0.001), less likely to have multifocal (p = 0.043) or bilateral (p = 0.037) disease and more likely to have initial macroscopic resection (p = 0.006), than those who had only one operation. Socioeconomic status did not significantly differ between the groups (p = 0.31). Similarly, there was no significant difference between the number of operations in patients from regional versus city residence and public versus private hospital. This is reassuring as it suggests similar surgical management options are available for patients regardless of socio-demographic background.  相似文献   
64.
65.
66.
67.
68.
To optimally demonstrate the value of risk management, our actions must show the benefits. The American Society for Healthcare Risk Management (ASHRM) board needs to provide support through tools and resources. ASHRM members must show through their actions the value of risk management. And ASHRM members need to show the organization where actions and activities should be focused in the future. Actions show the value of enterprise risk management.  相似文献   
69.
70.
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