全文获取类型
收费全文 | 35313篇 |
免费 | 2847篇 |
国内免费 | 693篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 854篇 |
妇产科学 | 105篇 |
基础医学 | 1456篇 |
口腔科学 | 50篇 |
临床医学 | 7003篇 |
内科学 | 15755篇 |
皮肤病学 | 37篇 |
神经病学 | 633篇 |
特种医学 | 1413篇 |
外科学 | 3139篇 |
综合类 | 4430篇 |
现状与发展 | 1篇 |
一般理论 | 1篇 |
预防医学 | 644篇 |
眼科学 | 30篇 |
药学 | 2043篇 |
13篇 | |
中国医学 | 894篇 |
肿瘤学 | 338篇 |
出版年
2024年 | 66篇 |
2023年 | 720篇 |
2022年 | 1041篇 |
2021年 | 1612篇 |
2020年 | 1535篇 |
2019年 | 1701篇 |
2018年 | 1533篇 |
2017年 | 1019篇 |
2016年 | 875篇 |
2015年 | 1114篇 |
2014年 | 2375篇 |
2013年 | 2060篇 |
2012年 | 1611篇 |
2011年 | 1866篇 |
2010年 | 1517篇 |
2009年 | 1480篇 |
2008年 | 1620篇 |
2007年 | 1695篇 |
2006年 | 1397篇 |
2005年 | 1339篇 |
2004年 | 1031篇 |
2003年 | 949篇 |
2002年 | 789篇 |
2001年 | 816篇 |
2000年 | 661篇 |
1999年 | 683篇 |
1998年 | 598篇 |
1997年 | 625篇 |
1996年 | 468篇 |
1995年 | 444篇 |
1994年 | 426篇 |
1993年 | 352篇 |
1992年 | 354篇 |
1991年 | 336篇 |
1990年 | 281篇 |
1989年 | 206篇 |
1988年 | 211篇 |
1987年 | 202篇 |
1986年 | 181篇 |
1985年 | 187篇 |
1984年 | 194篇 |
1983年 | 144篇 |
1982年 | 139篇 |
1981年 | 95篇 |
1980年 | 84篇 |
1979年 | 62篇 |
1978年 | 46篇 |
1977年 | 27篇 |
1976年 | 26篇 |
1973年 | 18篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
《Cancer radiothérapie》2022,26(4):611-615
In order to provide more convenient irradiation regimens for patient comfort, radiation facility organization and health expenses, new hypofractionated protocols have been evaluated. Moderately (dose/fraction: 2.3 to 3 Gy), then ultra (dose/fraction: 5.2 to 6.1 Gy) hypofractionated irradiations were first validated. The current question is: is it possible to go forward using extreme hypofractionated regimens (EHR) based on 1 to 3 fractions. Different irradiation techniques are under investigation. However, brachytherapy remains the smartest way to deliver a high dose in a small volume. We report prospective and retrospective study results which evaluated EHR for breast and prostate brachytherapy. While oncological outcome and toxicity profile appear extremely encouraging for low-risk breast cancer after a 1 to 4 fractions (6.25 to 20 Gy/fraction), the use of a single fraction of 19 to 23 Gy appears debatable for prostate cancer. Brachytherapy represents an emblematic example of EHR but longer follow-up and more mature results are awaited in order to specify the right indications and refine the EQD2 calculation method including new biological and technical factors. 相似文献
2.
3.
《Pancreatology》2022,22(8):1175-1180
BackgroundHepatic steatosis has been described as a common finding in adults following total pancreatectomy with islet autotransplantation (TPIAT) but it is unknown if this occurs in children and adolescents.ObjectivesTo define the frequency of post-TPIAT hepatic steatosis in a sample of children and adolescents and to identify clinical predictors of incident steatosis post-TPIAT.MethodsIn this prospective study, consecutive participants at least 1-month post-TPIAT underwent a liver MRI with proton density fat fraction (PDFF) and blood draw at our pediatric academic medical center between April 2021 and January 2022. Comparison clinical pre-TPIAT liver MRI or ultrasound and insulin use and graft function data were extracted from the medical record. T-tests were used for the comparison of means across continuous variables between participants with and without post-TPIAT steatosis.ResultsA total of 20 participants (mean: 13 ± 4 years; 12 female) were evaluated. Mean liver PDFF at research MRI was 7.4 ± 6.2% (range: 2–25%). Seven participants (35%) had categorical hepatic steatosis (PDFF>5%) post-TPIAT, five of whom had pre-TPIAT steatosis, reflecting a 13% (2/15; 95% CI: 2–40%) incidence of post-TPIAT steatosis. Participant characteristics were not significantly different between subgroups with and without post-TPIAT steatosis. Mean PDFF at research MRI was not different between graft function subgroups (7.5% optimal/good vs. 7.3% marginal/failure; p = .96).ConclusionOur study shows a moderate prevalence but low incidence of hepatic steatosis in a small sample of children and adolescents post-TPIAT. This study raises questions about a causal relationship between TPIAT and hepatic steatosis. 相似文献
4.
5.
6.
7.
8.
9.
10.