全文获取类型
收费全文 | 2419篇 |
免费 | 173篇 |
国内免费 | 20篇 |
专业分类
耳鼻咽喉 | 44篇 |
儿科学 | 66篇 |
妇产科学 | 32篇 |
基础医学 | 390篇 |
口腔科学 | 192篇 |
临床医学 | 167篇 |
内科学 | 489篇 |
皮肤病学 | 74篇 |
神经病学 | 161篇 |
特种医学 | 129篇 |
外科学 | 273篇 |
综合类 | 12篇 |
预防医学 | 89篇 |
眼科学 | 54篇 |
药学 | 169篇 |
中国医学 | 10篇 |
肿瘤学 | 261篇 |
出版年
2023年 | 13篇 |
2022年 | 33篇 |
2021年 | 54篇 |
2020年 | 30篇 |
2019年 | 50篇 |
2018年 | 64篇 |
2017年 | 42篇 |
2016年 | 59篇 |
2015年 | 78篇 |
2014年 | 84篇 |
2013年 | 81篇 |
2012年 | 152篇 |
2011年 | 162篇 |
2010年 | 100篇 |
2009年 | 82篇 |
2008年 | 157篇 |
2007年 | 146篇 |
2006年 | 160篇 |
2005年 | 172篇 |
2004年 | 137篇 |
2003年 | 127篇 |
2002年 | 131篇 |
2001年 | 53篇 |
2000年 | 43篇 |
1999年 | 45篇 |
1998年 | 30篇 |
1997年 | 23篇 |
1996年 | 21篇 |
1995年 | 16篇 |
1994年 | 17篇 |
1993年 | 20篇 |
1992年 | 24篇 |
1991年 | 18篇 |
1990年 | 14篇 |
1989年 | 20篇 |
1988年 | 18篇 |
1987年 | 12篇 |
1986年 | 12篇 |
1985年 | 16篇 |
1984年 | 9篇 |
1983年 | 7篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1980年 | 10篇 |
1979年 | 6篇 |
1975年 | 4篇 |
1974年 | 7篇 |
1973年 | 9篇 |
1971年 | 4篇 |
1969年 | 6篇 |
排序方式: 共有2612条查询结果,搜索用时 375 毫秒
1.
2.
3.
4.
5.
Yoshie Ochiai Kazuhiro Kurisu Takashi Kajiwara Hiroshi Kumeda Ryuji Tominaga 《The Japanese Journal of Thoracic and Cardiovascular Surgery》2004,52(2):81-83
We describe a case of type B aortic dissection with large ascending aortic aneurysm occurring 12.8 years after aortic root
replacement (Cabrol procedure) in a non-Marfan patient with cystic medial necrosis of the aorta. We have successfully performed
an extended total aortic arch replacement using a four-branched graft through the “L-indsion” approach (a combination of a
left anterior thoracotomy and upper half median sternotomy). Of note, a histological specimen from the aneurysmal ascending
aortic wall revealed “healed aortic dissection” with fibrous tissue replacing the media and intima in addition to multiple
foci of cystic medial necrosis. 相似文献
6.
7.
8.
Yoko Saeki Adachi Toshiko Itazawa Motokazu Nakabayashi Tatsuya Fuchizawa Yoshie Okabe Yasunori Ito Yuichi Adachi Gyokei Murakami Toshio Miyawaki 《Allergology international》2006,55(2):167-171
BACKGROUND: A new electronic mesh nebulizer, eMotion is known to have higher performance compared to conventional nebulizers. However, there are some concerns about whether too much delivered dose might cause side effects with higher frequency. METHODS: To evaluate the safety and usefulness of the nebulizer, we measured changes in heart rates and lung functions of 73 asthmatic children when they inhaled 1 microg/kg of procaterol with eMotion or a conventional nebulizer, Junior BOY. RESULTS: In 34 children with mild asthma exacerbation, physical findings, lung function and transcutaneous oxygen saturation levels were improved after inhalation using both nebulizers. No adverse effects including significant increase of heart rate were found. Improvements in the rates of the parameters were comparable. When response to beta2-agonist inhalation was checked in 39 children in stable condition, similar degrees of improvement in lung function were observed, and heart rates did not change after inhalation with either nebulizers. CONCLUSIONS: Safety and efficacy was comparable between eMotion and a conventional nebulizer when it was used to administer beta2-agonists in asthmatic children. However, from the fact that eMotion needs only 3-4 minutes to inhale 2 mL solution, eMotion could be more useful for most children who usually do not prefer longer inhalation time with conventional compressor nebulizers. 相似文献
9.
Histologic Classification of Endoscopically Removed Flat Colorectal Polyps: A Multicentric Study 总被引:1,自引:0,他引:1
A total of 594 flat colorectal polyps, removed at endoscopy, were histologically classified into non-neoplastic (n=49) and neoplastic (n=545) polyps. Non-neoplastic polyps were subdivided into metaplastic (n=45) and hyperplastic (n=4), whereas neoplastic polyps were subdivided into adenomas (n=481), intramucosal carcinomas (n=28) and invasive adenocarcinomas (n=36). Several adenoma phenotypes were discerned: tubular (n=375), serrated (n=59), villous (n=39), mixed (n=7) and fenestrated (n=1). Intramucosal carcinomas were subdivided into tubular (n=26) and serrated (n=2), and invasive adenocarcinomas into tubular (n=32), serrated (n=3) and fenestrated (n=1). The microscopic characteristics of each histologic phenotype described in this communication are defined and illustrated. 相似文献
10.