全文获取类型
收费全文 | 105478篇 |
免费 | 44044篇 |
国内免费 | 2087篇 |
专业分类
耳鼻咽喉 | 1698篇 |
儿科学 | 4560篇 |
妇产科学 | 971篇 |
基础医学 | 18567篇 |
口腔科学 | 5581篇 |
临床医学 | 16186篇 |
内科学 | 26805篇 |
皮肤病学 | 7772篇 |
神经病学 | 14466篇 |
特种医学 | 3149篇 |
外国民族医学 | 10篇 |
外科学 | 16463篇 |
综合类 | 5572篇 |
现状与发展 | 10篇 |
一般理论 | 34篇 |
预防医学 | 6372篇 |
眼科学 | 2001篇 |
药学 | 8963篇 |
32篇 | |
中国医学 | 2976篇 |
肿瘤学 | 9421篇 |
出版年
2024年 | 176篇 |
2023年 | 632篇 |
2022年 | 1466篇 |
2021年 | 2962篇 |
2020年 | 6348篇 |
2019年 | 11811篇 |
2018年 | 11108篇 |
2017年 | 12382篇 |
2016年 | 12911篇 |
2015年 | 13250篇 |
2014年 | 13474篇 |
2013年 | 13944篇 |
2012年 | 6538篇 |
2011年 | 6646篇 |
2010年 | 10658篇 |
2009年 | 6663篇 |
2008年 | 3637篇 |
2007年 | 2339篇 |
2006年 | 2320篇 |
2005年 | 1939篇 |
2004年 | 1570篇 |
2003年 | 1529篇 |
2002年 | 1425篇 |
2001年 | 1388篇 |
2000年 | 1234篇 |
1999年 | 822篇 |
1998年 | 386篇 |
1997年 | 362篇 |
1996年 | 251篇 |
1995年 | 219篇 |
1994年 | 182篇 |
1993年 | 143篇 |
1992年 | 144篇 |
1991年 | 111篇 |
1990年 | 85篇 |
1989年 | 70篇 |
1988年 | 93篇 |
1987年 | 91篇 |
1986年 | 51篇 |
1985年 | 51篇 |
1984年 | 27篇 |
1983年 | 23篇 |
1982年 | 24篇 |
1981年 | 15篇 |
1980年 | 9篇 |
1979年 | 28篇 |
1978年 | 12篇 |
1975年 | 8篇 |
1974年 | 8篇 |
1972年 | 7篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
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
94.
95.
96.
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
97.
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
98.
99.
Over a 2-year period we have identified pollen grains from 48 families of grasses, as well as mould spores and mite particles during air sampling in Guangxi Province. The major aeroallergens were Artemisia, Moraceae and Euophoribiacea, and the spores of Aspergillus, Penicillinum, Cephalosporium and Helminthosporium. Mites were probably also one of the major outdoor aeroallergens. Our investigations also included inspection of the vegetation of the geographical area involved, as well as skin testing on 774 subjects using extracts of 37 aeroallergens. We believe that this work has provided fundamental information on seasonal allergy in Southern China and South-east Asia. 相似文献
100.
目的 分析中学生自我差异与心理健康的关系。方法 采用自行修订的自我差异量表和SCL—90对500名中学生进行调查。结果 初中生现实自我与理想自我的差异(AI)和现实自我与应该自我的差异(AO)这两类自我差异分数都显著高于高中生。中学生两类自我差异各因子与心理健康各因子之间都显著相关(P〈0.05)。AI道德自我差异对初中生的心理健康有预测作用;AI心理自我差异与AI自我认同差异对高中生的心理健康有预测作用。结论 应针对中学生的心理特点,提高其对自我的认识,减少诱发心理问题的因素,促进中学生心理健康。 相似文献