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   8129篇
  免费   603篇
  国内免费   27篇
耳鼻咽喉   105篇
儿科学   195篇
妇产科学   198篇
基础医学   1231篇
口腔科学   214篇
临床医学   827篇
内科学   1772篇
皮肤病学   156篇
神经病学   491篇
特种医学   469篇
外国民族医学   1篇
外科学   1552篇
综合类   47篇
一般理论   3篇
预防医学   283篇
眼科学   189篇
药学   465篇
中国医学   10篇
肿瘤学   551篇
  2022年   49篇
  2021年   108篇
  2020年   76篇
  2019年   101篇
  2018年   133篇
  2017年   134篇
  2016年   169篇
  2015年   203篇
  2014年   249篇
  2013年   303篇
  2012年   464篇
  2011年   512篇
  2010年   276篇
  2009年   286篇
  2008年   473篇
  2007年   482篇
  2006年   433篇
  2005年   452篇
  2004年   363篇
  2003年   361篇
  2002年   334篇
  2001年   197篇
  2000年   224篇
  1999年   211篇
  1998年   100篇
  1997年   93篇
  1996年   68篇
  1995年   69篇
  1994年   60篇
  1993年   59篇
  1992年   114篇
  1991年   110篇
  1990年   108篇
  1989年   124篇
  1988年   71篇
  1987年   74篇
  1986年   76篇
  1985年   61篇
  1984年   52篇
  1983年   41篇
  1982年   39篇
  1981年   35篇
  1980年   33篇
  1979年   77篇
  1978年   40篇
  1976年   33篇
  1974年   52篇
  1973年   41篇
  1972年   47篇
  1971年   49篇
排序方式: 共有8759条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
Surgery is still a main therapeutic option in breast cancer treatment. Nowadays, methods of resection and reconstruction vary according to different tumors and patients. This review presents and discusses standards of care and arising questions on how radical primary breast cancer surgery should be according to different clinical situations. In most early breast cancer patients, breast conservation is the method of choice. The discussion on resection margins is still controversial as different studies show conflicting results. Modified radical mastectomy is the standard in locally advanced breast cancer patients, although there are different promising approaches to spare skin or even the nipple-areola complex. A sentinel node biopsy is the standard of care in clinically node-negative invasive breast cancer patients, whereas the significance of axillary lymphonodectomy seems to be questioned through a number of different findings. Although there are interesting findings to modify surgical approaches in very young or elderly breast cancer patients, it will always be an individualized approach if we do not adhere to current guidelines. Up to date, there are no special surgical procedures in BRCA mutation carriers or patients of high-risk families.  相似文献   
995.

Introduction  

Cortical-sparing adrenalectomy in bilateral pheochromocytomas offers a postoperative corticoid-free course and has to be balanced against the risk of local recurrence. In this study we report our experience with the minimally invasive cortical-sparing adrenalectomy in patients with bilateral pheochromocytomas.  相似文献   
996.
997.
Self-monitoring of blood glucose (SMBG) implicates a number of handling steps with the meter and the lancing device. Numerous user errors can occur during SMBG, and each step adds to the complexity of use. This report compares the required steps to perform SMBG of one fully integrated (the second generation of the Accu-Chek® Mobile), three partly integrated (Accu-Chek Compact Plus, Ascensia® Breeze®2, and Accu-Chek Aviva), and six conventional (Bayer Contour®, Bayer Contour USB, BGStar™, FreeStyle Lite®, OneTouch® Ultra® 2, and OneTouch Verio™Pro) systems. The results show that the fully integrated system reduces the number of steps to perform SMBG. The mean decrease is approximately 70% compared with the other systems. We assume that a reduction of handling steps also reduces the risk of potential user errors and improves the user-friendliness of the system.  相似文献   
998.
999.

Introduction  

The purpose of this study was to evaluate the safety and efficacy of the recently available flow diverter “pipeline embolization device” (PED) for the treatment of intracranial aneurysms and dissections.  相似文献   
1000.
To predict where subjects look under natural viewing conditions, biologically inspired saliency models decompose visual input into a set of feature maps across spatial scales. The output of these feature maps are summed to yield the final saliency map. We studied the integration of bottom-up feature maps across multiple spatial scales by using eye movement data from four recent eye tracking datasets. We use AdaBoost as the central computational module that takes into account feature selection, thresholding, weight assignment, and integration in a principled and nonlinear learning framework. By combining the output of feature maps via a series of nonlinear classifiers, the new model consistently predicts eye movements better than any of its competitors.  相似文献   
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