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   1430150篇
  免费   99717篇
  国内免费   2000篇
耳鼻咽喉   18773篇
儿科学   47503篇
妇产科学   40131篇
基础医学   212020篇
口腔科学   39664篇
临床医学   130471篇
内科学   276841篇
皮肤病学   31202篇
神经病学   112114篇
特种医学   56629篇
外国民族医学   356篇
外科学   203738篇
综合类   26727篇
现状与发展   3篇
一般理论   570篇
预防医学   118562篇
眼科学   31842篇
药学   104094篇
  8篇
中国医学   2148篇
肿瘤学   78471篇
  2018年   16770篇
  2017年   13999篇
  2016年   14311篇
  2015年   17674篇
  2014年   21931篇
  2013年   30532篇
  2012年   46584篇
  2011年   44194篇
  2010年   25013篇
  2009年   25743篇
  2008年   39531篇
  2007年   42855篇
  2006年   42680篇
  2005年   49257篇
  2004年   49152篇
  2003年   43462篇
  2002年   37936篇
  2001年   59329篇
  2000年   58402篇
  1999年   52589篇
  1998年   13854篇
  1997年   12454篇
  1996年   12921篇
  1995年   12219篇
  1994年   11401篇
  1992年   43422篇
  1991年   43134篇
  1990年   42083篇
  1989年   40660篇
  1988年   37770篇
  1987年   36969篇
  1986年   35220篇
  1985年   32906篇
  1984年   24830篇
  1983年   21491篇
  1982年   12206篇
  1979年   24016篇
  1978年   17307篇
  1977年   14264篇
  1976年   13164篇
  1975年   14867篇
  1974年   18205篇
  1973年   17652篇
  1972年   16838篇
  1971年   15881篇
  1970年   14956篇
  1969年   14183篇
  1968年   13171篇
  1967年   11946篇
  1966年   11231篇
排序方式: 共有10000条查询结果,搜索用时 140 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