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   1313804篇
  免费   100129篇
  国内免费   1706篇
耳鼻咽喉   17008篇
儿科学   42421篇
妇产科学   36265篇
基础医学   197726篇
口腔科学   35927篇
临床医学   122840篇
内科学   257810篇
皮肤病学   28029篇
神经病学   107072篇
特种医学   48921篇
外国民族医学   301篇
外科学   185181篇
综合类   26209篇
现状与发展   3篇
一般理论   640篇
预防医学   108861篇
眼科学   28998篇
药学   96329篇
  6篇
中国医学   2165篇
肿瘤学   72927篇
  2019年   10784篇
  2018年   14499篇
  2017年   11058篇
  2016年   12099篇
  2015年   14006篇
  2014年   19127篇
  2013年   29445篇
  2012年   40123篇
  2011年   42603篇
  2010年   24942篇
  2009年   23840篇
  2008年   40094篇
  2007年   42863篇
  2006年   42434篇
  2005年   41454篇
  2004年   39878篇
  2003年   38100篇
  2002年   37059篇
  2001年   57583篇
  2000年   58658篇
  1999年   49522篇
  1998年   14088篇
  1997年   12771篇
  1996年   13132篇
  1995年   12450篇
  1994年   11543篇
  1993年   10886篇
  1992年   39269篇
  1991年   38683篇
  1990年   37431篇
  1989年   36228篇
  1988年   33498篇
  1987年   32855篇
  1986年   31297篇
  1985年   29518篇
  1984年   22483篇
  1983年   19712篇
  1982年   11733篇
  1979年   21429篇
  1978年   15686篇
  1977年   13078篇
  1976年   12076篇
  1975年   13103篇
  1974年   15916篇
  1973年   15654篇
  1972年   14794篇
  1971年   13794篇
  1970年   12992篇
  1969年   12263篇
  1968年   11376篇
排序方式: 共有10000条查询结果,搜索用时 20 毫秒
51.
Pharmaceutical Chemistry Journal - Three extracts were produced from the above-ground part of the meadowsweet Filipendula ulmaria (L.) Maxim. using water, 40% ethanol, and 70% ethanol. Comparative...  相似文献   
52.
Caring for patients with end-stage kidney disease (ESKD) in the United States is challenging, due in part to the complex epidemiology of the disease's progression as well as the ways in which care is delivered. As CKD progresses toward ESKD, the number of comorbidities increases and care involves multiple healthcare providers from multiple subspecialties. This occurs in the context of a fragmented US healthcare delivery system that is traditionally siloed by provider specialty, organization, as well as systems of payment and administration. This article describes the role of care fragmentation in the delivery of optimal ESKD care and identifies research gaps in the evidence across the continuum of care. We then consider the impact of care fragmentation on ESKD care from the patient and health system perspectives and explore opportunities for system-level interventions aimed at improving care for patients with ESKD.  相似文献   
53.
As millions of people turn to social media for health information, better understanding the factors that guide health-related judgments and perceptions in this context is imperative. We report on two Web experiments (n > 400 total) examining the power of society’s widespread weight bias and related stereotypes to influence nutrition judgments in social media spaces. In Experiment 1, meals were judged as lower in nutritional quality when the person who recommended them (the source) was depicted as obese rather than of normal weight, an effect mediated by stereotypic beliefs about the source as a generally unhealthy person. Experiment 2 replicated this effect, which—notably—remained significant when controlling for objective nutritional information (calories and fat content). Results highlight spillover effects of weight bias that extend beyond person perception to color impressions of objects (here, food) that are associated with stigmatized attributes. Implications for everyday nutrition judgments and public health are considered.  相似文献   
54.
55.
56.
57.
58.
A 48-year-old smoker with a history of hyperthyroidism treated 10 years prior to presentation with radioactive iodine ablation of the thyroid gland presented to his ophthalmologist with a 2-week history of transient loss of vision in the right eye occurring for 1 to 2 hours each morning. He denied ocular pain, diplopia or change in the prominence of one or both eyes. Examination revealed 2 mm of relative proptosis on the right, bilateral temporal flare and lower lid retraction. There was minimal upper lid retraction and no evidence of lid lag. Ocular motility was full. Dilated fundoscopic examination revealed bilateral optic nerve edema, right more than left. CT of the orbit demonstrated enlargement of the extraocular muscles bilaterally with marked enlargement of the right medial rectus and left inferior rectus muscles resulting in crowding at the orbital apex bilaterally. Laboratory testing revealed the patient to be hyperthyroid. The patient was treated with high dose oral steroids followed by orbital radiation. Hyperthyroidism was managed by the patient’s primary care physician. Visual symptoms rapidly improved with oral steroids and orbital radiation. Optic nerve edema completely resolved. Repeat CT imaging demonstrated a reduction in the enlargement of the extraocular muscles with relief of bilateral optic nerve compression.  相似文献   
59.
60.
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