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   12802篇
  免费   1066篇
  国内免费   14篇
耳鼻咽喉   106篇
儿科学   548篇
妇产科学   322篇
基础医学   1497篇
口腔科学   178篇
临床医学   1888篇
内科学   2328篇
皮肤病学   463篇
神经病学   936篇
特种医学   347篇
外科学   1514篇
综合类   231篇
一般理论   17篇
预防医学   1522篇
眼科学   188篇
药学   721篇
  1篇
中国医学   8篇
肿瘤学   1067篇
  2022年   89篇
  2021年   201篇
  2020年   115篇
  2019年   220篇
  2018年   229篇
  2017年   197篇
  2016年   216篇
  2015年   212篇
  2014年   301篇
  2013年   478篇
  2012年   669篇
  2011年   730篇
  2010年   411篇
  2009年   358篇
  2008年   719篇
  2007年   723篇
  2006年   725篇
  2005年   682篇
  2004年   648篇
  2003年   646篇
  2002年   588篇
  2001年   239篇
  2000年   262篇
  1999年   253篇
  1998年   134篇
  1997年   146篇
  1996年   147篇
  1995年   127篇
  1994年   96篇
  1993年   97篇
  1992年   175篇
  1991年   194篇
  1990年   189篇
  1989年   163篇
  1988年   199篇
  1987年   173篇
  1986年   139篇
  1985年   185篇
  1984年   128篇
  1983年   132篇
  1982年   91篇
  1981年   77篇
  1979年   120篇
  1978年   118篇
  1977年   84篇
  1976年   79篇
  1975年   81篇
  1974年   98篇
  1973年   105篇
  1972年   74篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
ABSTRACT

A monocausal bacteriological understanding of infectious disease orients tuberculosis control efforts towards antimicrobial interventions. A bias towards technological solutions can leave multistranded public health and social interventions largely neglected. In the context of globalising biomedical approaches to infectious disease control, this ethnography-inspired review article reflects upon the implementation of rapid diagnostic technology in low- and middle-income countries. Fieldwork observations in Vietnam provided a stimulus for a critical review of the global rollout of tuberculosis diagnostic technology. To address local needs in tuberculosis control, health managers in resource-poor settings are readily cooperating with international donors to deploy novel diagnostic technologies throughout national tuberculosis programme facilities. Increasing investment in new diagnostic technologies is predicated on the supposition that these interventions will ameliorate disease outcomes. However, suboptimal treatment control persists even when accurate diagnostic technologies are available, suggesting that promotion of singular technological solutions can distract from addressing systemic change, without which disease susceptibility, propagation of infection, detection gaps, diagnostic delays, and treatment shortfalls persist.  相似文献   
3.
4.
5.
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   
6.
7.
8.
Extrahepatic portal vein thrombosis (EHPVT) may occur in children or adults and usually comes to clinical attention due to complications of portal hypertension such as variceal hemorrhage. A variety of standard surgical techniques exist to manage these patients, but when these fail surgical options are limited. We describe two novel portosystemic shunts that utilize the gonadal vein as an autologous conduit. Four patients were evaluated for EHPVT with variceal bleeding. None of the patients were candidates for a standard splenorenal shunt due to prior surgical procedures. The first patient underwent a left mesogonadal shunt and the remaining 3 patients underwent a right mesogonadal shunt. Postoperative ultrasound or computed tomography (CT) scan confirmed early patency of the shunt in each patient. There have been no further episodes of variceal hemorrhage with follow-up of 3.5 years in the child who underwent the left mesogonadal shunt, and 17, 19, and 20 months in the patients who underwent the right mesogonadal shunt. Three of the 4 shunts remain patent. One shunt thrombosis occurred in a patient homozygous for the Factor V Leiden mutation despite anticoagulation with coumadin. This is the first report of the successful use of the gonadal vein as an in situ conduit for constructing a portosystemic shunt. In conclusion, the right and left mesogonadal shunts may be useful as salvage operations for patients with EHPVT who have failed standard surgical shunt procedures.  相似文献   
9.
The use of N-acetylcysteine has increased in the prevention of radiographic contrast induced nephrotoxicity. Many nurses need to be aware of the proper administration and action of this prophylactic agent. This article discusses the research behind the use of N-acetylcysteine and the protocol for administration to prevent radiographic contrast-induced nephrotoxicity.  相似文献   
10.
Interferon alfa2 (IFN-α2) is a parenterally administered cytokine used to treat patients with Hepatitis C and B, and malignancy. Interferon (INF) has a relatively high rate of central nervous system (CNS) adverse effects, including agitation, depression, fatigue, cognitive dysfunction, suicidal thought and drug craving. Using functional magnetic resonance imaging (fMRI) we studied patients with Hepatitis C virus (HCV) infection who were not more than mildly clinically depressed at baseline for their CNS reaction to IFN-α2. During fMRI, patients underwent visual stimulation with pictures designed to induce feelings of depression. In the two patients who became clinically depressed or markedly anxious while on treatment with interferon, but not in patients who did not experience these effects, there was a significant activation in specific areas of the brain known to be involved with depression, along with an increase above baseline in the Beck Depression Scale for the patient who developed INF-induced depression. The activation pattern differed from that previously observed for endogenous depression, indicating that INF-induced depression may differ in its underlying neuropathology. Functional magnetic resonance imaging can be an important tool in understanding and monitoring for (INF and other) medication-induced CNS effects, and response to treatment.  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