全文获取类型
收费全文 | 14125篇 |
免费 | 1220篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 209篇 |
儿科学 | 459篇 |
妇产科学 | 496篇 |
基础医学 | 1749篇 |
口腔科学 | 201篇 |
临床医学 | 1652篇 |
内科学 | 2592篇 |
皮肤病学 | 200篇 |
神经病学 | 1634篇 |
特种医学 | 344篇 |
外科学 | 1520篇 |
综合类 | 362篇 |
一般理论 | 11篇 |
预防医学 | 1615篇 |
眼科学 | 180篇 |
药学 | 1187篇 |
中国医学 | 15篇 |
肿瘤学 | 941篇 |
出版年
2022年 | 107篇 |
2021年 | 283篇 |
2020年 | 192篇 |
2019年 | 248篇 |
2018年 | 289篇 |
2017年 | 254篇 |
2016年 | 264篇 |
2015年 | 250篇 |
2014年 | 414篇 |
2013年 | 572篇 |
2012年 | 819篇 |
2011年 | 849篇 |
2010年 | 442篇 |
2009年 | 358篇 |
2008年 | 735篇 |
2007年 | 700篇 |
2006年 | 672篇 |
2005年 | 663篇 |
2004年 | 623篇 |
2003年 | 601篇 |
2002年 | 574篇 |
2001年 | 388篇 |
2000年 | 399篇 |
1999年 | 345篇 |
1998年 | 151篇 |
1997年 | 152篇 |
1996年 | 129篇 |
1995年 | 114篇 |
1994年 | 100篇 |
1993年 | 92篇 |
1992年 | 219篇 |
1991年 | 241篇 |
1990年 | 270篇 |
1989年 | 218篇 |
1988年 | 190篇 |
1987年 | 207篇 |
1986年 | 189篇 |
1985年 | 216篇 |
1984年 | 161篇 |
1983年 | 111篇 |
1982年 | 79篇 |
1981年 | 72篇 |
1980年 | 73篇 |
1979年 | 112篇 |
1978年 | 101篇 |
1975年 | 74篇 |
1974年 | 103篇 |
1973年 | 89篇 |
1972年 | 86篇 |
1971年 | 71篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Journal of Behavioral Medicine - Evidence supports the use of graphic warnings to educate the public about the health harms of smoking and suggests warnings eliciting negative emotional responses... 相似文献
2.
3.
4.
5.
Fluid role boundaries: exploring the contribution of the advanced nurse practitioner to multi‐professional palliative care 下载免费PDF全文
6.
John P. Sundberg Kathleen A. Silva Victoria E. Kennedy John J. Wilson Nicholas E. Gott Beth A. Sundberg Derry C. Roopenian 《Experimental dermatology》2019,28(9):1091-1093
2‐deoxy D‐glucose (2DG) was tested for efficacy in treating alopecia areata using the C3H/HeJ skin graft model. 2DG has proven to be efficacious in treatment of various mouse models of autoimmunity with minimal serious side effects noted. This agent has been shown to normalize abnormally activated T‐cell populations while also preventing cell surface expression of NKG2D; key factors defining alopecia areata disease progression. Daily oral ingestion of 2DG via drinking water to mice with patchy or diffuse alopecia areata for 16 weeks failed to prevent expansion of alopecia or cause regrowth of hair in treated mice. Histologically, there were no differences between treated and control groups. These results indicate that, while 2DG is effective for some autoimmune diseases, it was not efficacious for the cell‐mediated autoimmune mouse disease, alopecia areata. 相似文献
7.
Diffuse dermal angiomatosis: a contributory factor to ulceration in a patient with renal transplant 下载免费PDF全文
We present the case of a 54‐year‐old patient with renal transplant who developed unusual vascular changes on the forearm distal to a functioning arteriovenous fistula, as well as a painful ulcerated lesion on her anterior abdominal wall. We believe that the diffuse dermal angioendotheliomatosis variant of reactive angioendotheliomatosis had a role in the pathogenesis of this patient's lesions. 相似文献
8.
Carmine Nieuwstraten N Renee Labiris Anne Holbrook 《Revue canadienne de psychiatrie》2006,51(5):300-316
OBJECTIVE: Antidepressants are commonly used drugs with potential for numerous drug interactions. This study aims to systematically review the literature on drug interactions with antidepressants. METHODS: We searched MEDLINE (1966 to November 2003) and EMBASE (1980 to 2003), using the heading drug interactions combined with individual antidepressant names. We restricted searches to English-language articles and human studies. We screened drug interaction texts and review articles for relevant studies. We included articles reporting original human data on drug interactions with antidepressants commonly used in North America. Articles were independently evaluated by 2 reviewers on clinical effect, clinical significance, and quality of evidence. Discrepancies were resolved by consensus. RESULTS: There were 904 eligible interactions, involving 9509 patients, for a total of 598 summary interactions. Of these, 439 (73%) demonstrated an interaction, 148 (25%) had no effect, and 11 (2%) had conflicting evidence. For 510 interactions (85%), the quality of evidence was poor. It was fair for 67 (11%) interactions and good for 10 (2%) interactions. There were no interactions with excellent quality of evidence. There were 145 (24%) interactions of major clinical significance. These were predominantly hypertensive emergencies and serotonin syndrome. Most interacting drugs had central nervous system (CNS) activity. As expected, monoamine oxidase inhibitors (MAOIs) appear to be the most problematic family in terms of potential for serious drug interactions. CONCLUSIONS: Drug interactions with antidepressants are an important cause for concern, but this concern is based primarily on poor evidence. We recommend caution when combining antidepressants with other CNS drugs, particularly when coadministering MAOIs with other substances. 相似文献
9.
贺晓新 《结核与肺部疾病杂志》2006,1(3):153-156
科学研究的目标是创造和传播知识。这得通过对系统收集以及报告信息的批判性分析来完成。批判性分析始于一个简单的步骤,即在运用复杂统计学分析方法进行比较之前对所收集的数据进行深入检查。根据所收集的数据类型按照标准化方式进行统计学分析。在为解决研究问题而需采用合理、标准化步骤进行比较时,新知识就产生了,同时要避免错误的结论。在对数据进行仔细检查和分析之后,为了保证结论的正确性,再对数据进行一次批判性评论是非常重要的补充步骤。在科学文献中发表研究成果过程中涉及的同行评价对于传播新知识并保证其质量方面是一个非常重要的步骤。如果没有将研究成果发表供同行参考,这项研究就不算完整。 相似文献
10.