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   3317篇
  免费   198篇
  国内免费   14篇
耳鼻咽喉   19篇
儿科学   168篇
妇产科学   47篇
基础医学   361篇
口腔科学   39篇
临床医学   241篇
内科学   559篇
皮肤病学   44篇
神经病学   482篇
特种医学   383篇
外科学   338篇
综合类   90篇
一般理论   3篇
预防医学   304篇
眼科学   246篇
药学   110篇
中国医学   2篇
肿瘤学   93篇
  2021年   28篇
  2019年   42篇
  2018年   41篇
  2017年   39篇
  2016年   62篇
  2015年   48篇
  2014年   67篇
  2013年   103篇
  2012年   145篇
  2011年   143篇
  2010年   83篇
  2009年   69篇
  2008年   129篇
  2007年   113篇
  2006年   115篇
  2005年   146篇
  2004年   129篇
  2003年   111篇
  2002年   113篇
  2001年   103篇
  2000年   116篇
  1999年   89篇
  1998年   51篇
  1997年   75篇
  1996年   44篇
  1995年   48篇
  1994年   34篇
  1993年   33篇
  1992年   68篇
  1991年   65篇
  1990年   67篇
  1989年   71篇
  1988年   72篇
  1987年   74篇
  1986年   71篇
  1985年   67篇
  1984年   51篇
  1983年   36篇
  1982年   45篇
  1981年   32篇
  1980年   30篇
  1979年   45篇
  1978年   35篇
  1977年   35篇
  1976年   23篇
  1975年   29篇
  1974年   27篇
  1973年   32篇
  1970年   23篇
  1968年   26篇
排序方式: 共有3529条查询结果,搜索用时 15 毫秒
1.
2.
A national conference on organ donation after cardiac death (DCD) was convened to expand the practice of DCD in the continuum of quality end-of-life care. This national conference affirmed the ethical propriety of DCD as not violating the dead donor rule. Further, by new developments not previously reported, the conference resolved controversy regarding the period of circulatory cessation that determines death and allows administration of pre-recovery pharmacologic agents, it established conditions of DCD eligibility, it presented current data regarding the successful transplantation of organs from DCD, it proposed a new framework of data reporting regarding ischemic events, it made specific recommendations to agencies and organizations to remove barriers to DCD, it brought guidance regarding organ allocation and the process of informed consent and it set an action plan to address media issues. When a consensual decision is made to withdraw life support by the attending physician and patient or by the attending physician and a family member or surrogate (particularly in an intensive care unit), a routine opportunity for DCD should be available to honor the deceased donor's wishes in every donor service area (DSA) of the United States.  相似文献   
3.
To test the reported antipanic efficacy of clonazepam, the authors randomized 72 subjects with panic disorder to 6 weeks of treatment with either alprazolam, clonazepam, or placebo. Endpoint analysis demonstrated a significant beneficial effect of both active treatments, but not placebo treatment, on the frequency of panic attacks, overall phobia ratings, and the extent of disability. Comparison of the two active treatments revealed no significant differences and no consistent tendency for one agent to be favored over another, although power to detect small differences was limited. Sedation and ataxia were the most common side effects reported, but these effects were mild and transient and did not interfere with treatment outcome. The results of this double-blind, placebo-controlled trial are consistent with previous reports of clonazepam's antipanic efficacy.  相似文献   
4.
The exact location of hemorrhage complicating anticoagulant therapy is sometimes difficult to establish. We present a case in which imaging with 99mTc-labeled red cells had a significant role in the diagnosis of soft-tissue bleeding in a paraplegic patient receiving long-term anticoagulation.  相似文献   
5.
6.
7.
Bilateral anterior uveitis and interstitial nephritis   总被引:3,自引:0,他引:3  
Five patients had bilateral anterior uveitis associated with renal disease. Interstitial nephritis was histologically confirmed in three cases. Fatigue, anorexia, abdominal pain, weight loss, and anemia were common systemic complaints or findings. In each case, the uveitis was anterior, eventually bilateral, and associated with minimal visual impairment. Complications of the uveitis included increased intraocular pressure, synechiae, keratic precipitates, macular edema, and intraretinal hemorrhage as well as cells in the anterior vitreous humor and an exudate over the pars plana. Sj?gren's syndrome, systemic lupus erythematosus, sarcoid, and syphilis were excluded as diagnoses that could explain the association of renal and uveal disease.  相似文献   
8.
9.
10.
Ocular syphilis in patients with human immunodeficiency virus infection   总被引:3,自引:0,他引:3  
We diagnosed ocular syphilis in three homosexual men infected with human immunodeficiency virus (HIV). Ocular inflammation included uveitis, optic neuritis, and retinitis. Dermatologic and central nervous system manifestations of secondary syphilis were also present. The history of homosexuality was difficult to obtain. Concomitant infection with HIV may alter the course of syphilis, obscure the diagnosis, and impair the response to therapy.  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