全文获取类型
收费全文 | 75031篇 |
免费 | 41252篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 1490篇 |
儿科学 | 4199篇 |
妇产科学 | 529篇 |
基础医学 | 15317篇 |
口腔科学 | 5035篇 |
临床医学 | 12193篇 |
内科学 | 22525篇 |
皮肤病学 | 7425篇 |
神经病学 | 13221篇 |
特种医学 | 2122篇 |
外科学 | 13505篇 |
综合类 | 2篇 |
一般理论 | 22篇 |
预防医学 | 4043篇 |
眼科学 | 1220篇 |
药学 | 5459篇 |
中国医学 | 1007篇 |
肿瘤学 | 6971篇 |
出版年
2023年 | 26篇 |
2022年 | 29篇 |
2021年 | 1233篇 |
2020年 | 5021篇 |
2019年 | 10794篇 |
2018年 | 10041篇 |
2017年 | 11424篇 |
2016年 | 12049篇 |
2015年 | 11881篇 |
2014年 | 11754篇 |
2013年 | 12223篇 |
2012年 | 3948篇 |
2011年 | 3870篇 |
2010年 | 8821篇 |
2009年 | 5195篇 |
2008年 | 1902篇 |
2007年 | 752篇 |
2006年 | 803篇 |
2005年 | 585篇 |
2004年 | 622篇 |
2003年 | 622篇 |
2002年 | 720篇 |
2001年 | 757篇 |
2000年 | 685篇 |
1999年 | 254篇 |
1998年 | 33篇 |
1997年 | 19篇 |
1996年 | 23篇 |
1995年 | 15篇 |
1994年 | 18篇 |
1993年 | 13篇 |
1992年 | 30篇 |
1991年 | 15篇 |
1990年 | 14篇 |
1989年 | 14篇 |
1988年 | 8篇 |
1987年 | 11篇 |
1986年 | 6篇 |
1985年 | 9篇 |
1984年 | 10篇 |
1983年 | 3篇 |
1982年 | 6篇 |
1981年 | 8篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1978年 | 3篇 |
1975年 | 3篇 |
1971年 | 2篇 |
1963年 | 1篇 |
1959年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
92.
93.
94.
Yasushi Sano Hirohisa Machida Kuang‐I. Fu Hiroaki Ito Takahiro Fujii 《Digestive endoscopy》2004,16(Z1):S93-S96
The goal of endoscopic mucosal resection (EMR) is to allow the endoscopist to obtain tissue or resect lesions not previously amenable to standard biopsy or excisional techniques and to remove malignant lesions without open surgery. In this article, we describe the results of conventional EMR and EMR using an insulation‐tipped (IT) electrosurgical knife (submucosal dissection method) for large colorectal mucosal neoplasms and discuss the problems and future prospects of these procedures. At present, conventional EMR is much more feasible than EMR using IT‐knife from the perspectives of time, money, complication, and organ preservation. However, larger lesions tend to be resected in a piecemeal fashion; and it is difficult to confirm whether EMR has been complete. For accurate histopathological assessment of the resected specimen en bloc EMR is desirable although further experience is needed to establish its safety and efficacy. Further improvements of in EMR with special knife techniques are required to simply and safely remove large colorectal neoplasms. 相似文献
95.
96.
97.
Bernadette Lalonde Jacqueline E Wolvaardt Elize M Webb Amy Tournas‐Hardt 《Journal of the International AIDS Society》2007,9(1):6-6
The objective of the study was to conduct a process and outcomes evaluation of the International AIDS Conference (IAC). Reaction evaluation data are presented from a delegate survey distributed at the 2004 IAC held in Thailand. Input and output data from the Thailand IAC are compared to data from previous IACs to ascertain attendance and reaction trends, which delegates benefit most, and host country effects. Outcomes effectiveness data were collected via a survey and intercept interviews. Data suggest that the host country may significantly affect the number and quality of basic science IAC presentations, who attends, and who benefits most. Intended and executed HIV work‐related behavior change was assessed under 9 classifications. Delegates who attended 1 previous IAC were more likely to report behavior changes than attendees who attended more than 1 previous IAC. The conference needs to be continually evaluated to elicit the required data to plan effective future IACs. 相似文献
98.
This paper considers the immediate post‐traumatic reactions of rescue personnel who were exposed to the Hilton Hotel bombing in Sinai. The entire rescue personnel (n = 26) were assessed and separated into two groups on the basis of previous exposure to the same type of trauma. The results suggest that among rescue personnel, those with previous exposure had a lower level of post‐traumatic symptoms than those who were being exposed for the first time. This supports the hypothesis that previous exposure to the same type of trauma has an immunizing effect for subsequent same type of traumatic event among rescue personnel. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
99.
In this paper we describe Bonferroni‐based multiple testing procedures (MTPs) as strategies to split and recycle test mass. Here, ‘test mass’ refers to (parts of) the nominal level α at which the family‐wise error rate is controlled. Briefly, test mass is split between different null hypotheses, and whenever a null hypothesis is rejected, the part of α allocated to it may be recycled to the testing of other hypotheses. These recycling MTPs are closed testing procedures based on raw p‐values associated with testing the individual null hypotheses, and the class of such MTPs includes, for example, serial and parallel gatekeeping, fallback and Holm procedures. Graphical displays and a concise algebraic notation are provided for such MTPs. This recycling approach has pedagogical advantages and may facilitate the tailoring of MTPs for different purposes. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
100.