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   8036篇
  免费   460篇
  国内免费   12篇
耳鼻咽喉   56篇
儿科学   223篇
妇产科学   133篇
基础医学   778篇
口腔科学   180篇
临床医学   837篇
内科学   1627篇
皮肤病学   137篇
神经病学   552篇
特种医学   236篇
外科学   1413篇
综合类   142篇
一般理论   5篇
预防医学   692篇
眼科学   332篇
药学   632篇
中国医学   7篇
肿瘤学   526篇
  2024年   8篇
  2023年   80篇
  2022年   161篇
  2021年   328篇
  2020年   146篇
  2019年   227篇
  2018年   263篇
  2017年   216篇
  2016年   239篇
  2015年   268篇
  2014年   353篇
  2013年   467篇
  2012年   698篇
  2011年   716篇
  2010年   380篇
  2009年   316篇
  2008年   491篇
  2007年   490篇
  2006年   419篇
  2005年   459篇
  2004年   401篇
  2003年   350篇
  2002年   280篇
  2001年   72篇
  2000年   50篇
  1999年   55篇
  1998年   53篇
  1997年   38篇
  1996年   32篇
  1995年   36篇
  1994年   27篇
  1993年   18篇
  1992年   33篇
  1991年   37篇
  1990年   29篇
  1989年   26篇
  1988年   16篇
  1987年   18篇
  1986年   19篇
  1985年   15篇
  1984年   22篇
  1983年   16篇
  1980年   15篇
  1979年   10篇
  1978年   8篇
  1974年   8篇
  1973年   11篇
  1972年   8篇
  1971年   12篇
  1970年   9篇
排序方式: 共有8508条查询结果,搜索用时 15 毫秒
1.
2.
3.
The first COVID-19 vaccination was given in December 2020 and there is an effort to vaccinate the international population on a massive scale. Common side effects from the vaccine include headache and tiredness. Regional lymphadenopathy has been described in relation to other vaccines. We describe two cases of supraclavicular reactive lymphadenopathy presenting in patients who had the COVID vaccination in the ipsilateral arm. Awareness of this diagnosis is important for patients presenting to the neck lump clinic.  相似文献   
4.
5.
6.

Objective

Hypertonic saline (HTS) has potent immune and vascular effects. We assessed recipient pretreatment with HTS on allograft function in a porcine model of heart transplantation and hypothesized that HTS infusion would limit endothelial and left ventricular (LV) dysfunction following transplantation.

Methods

Heart transplants were performed after 6 hours of cold ischemic storage. Recipient pigs were randomized to treatment with or without HTS (7.5% NaCl) before cardiopulmonary bypass (CPB). Using a myograft apparatus, coronary artery endothelial-dependent (Edep) and -independent (Eind) relaxation was assessed. LV performance was determined using pressure-volume loop analysis. Pulmonary interleukin (IL)-2, IL-6, and tumor necrosis factor (TNF)-α expression was measured.

Results

Weaning from CPB and LV performance after transplantation were improved in HTS-treated animals. Successful weaning from CPB was greater in the HTS-treated hearts (8 of 8 vs 2 of 8; P < .05). Mean LV functional recovery was improved in the HTS-treated animals, as assessed by preload recruitable stroke work (65 ± 10% vs 27 ± 10%; P < .001) and end-systolic elastance (55 ± 7% vs 37 ± 4%; P < .001). Treatment with HTS resulted in improved Edep (mean maximum elastance [Emax], 56 ± 5% vs 37 ± 7%; P < .001) and Eind (mean Emax%, 77 ± 6% vs 52 ± 4%; P < .001) vasorelaxation compared with control. Pulmonary expression of IL-2, IL-6, and TNF-α increased following transplantation, whereas HTS therapy attenuated IL production (P < .001). Transplantation increased plasma TNF-α levels and LV TNF-α expression, whereas HTS prevented this up-regulation (P < .001).

Conclusions

Recipient HTS pretreatment preserves allograft vasomotor and LV function, and HTS therapy limits CPB-induced injury. HTS may be a novel recipient intervention to prevent graft dysfunction.  相似文献   
7.
Functional recovery, the goal of treatment, has long been overlooked in the assessment of effectiveness of pharmacological treatments. However, with the recent shift in paradigm, from syndromal–symptomatic recovery to functional recovery, there appears to be a new interest in the definition and evaluation of functional recovery. Since functional recovery lags symptomatic recovery, sometimes by months or years, the attainment of functional recovery will be determined by both efficacy and long-term compliance. Quetiapine, due to its efficacy in both mania and depression, and effect on cognition may lead to improved functioning in patients with bipolar disorder.  相似文献   
8.
9.
10.
The concept of citizenship is becoming more and more prominent in specific fields, such as psychiatry/mental health, where it is constituted as a solution to the issues of exclusion, discrimination, and poverty often endured by the mentally ill. We argue that such discourse of citizenship represents a break in the history of psychiatry and constitutes a powerful strategy to counter the effects of equally powerful psychiatric labelling. However, we call into question the emancipatory promise of a citizenship agenda. Foucault's concept of governmentality is helpful in understanding the production of the citizen subject, its location within the ‘art of government’, as well as the ethical and political implications of citizenship in the context of mental health.  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