全文获取类型
收费全文 | 93097篇 |
免费 | 9585篇 |
国内免费 | 6357篇 |
专业分类
耳鼻咽喉 | 750篇 |
儿科学 | 1568篇 |
妇产科学 | 1030篇 |
基础医学 | 9803篇 |
口腔科学 | 1712篇 |
临床医学 | 12524篇 |
内科学 | 12380篇 |
皮肤病学 | 1022篇 |
神经病学 | 4022篇 |
特种医学 | 3190篇 |
外国民族医学 | 43篇 |
外科学 | 8414篇 |
综合类 | 18138篇 |
现状与发展 | 18篇 |
一般理论 | 22篇 |
预防医学 | 7445篇 |
眼科学 | 2518篇 |
药学 | 10766篇 |
106篇 | |
中国医学 | 6396篇 |
肿瘤学 | 7172篇 |
出版年
2024年 | 223篇 |
2023年 | 1341篇 |
2022年 | 2585篇 |
2021年 | 4839篇 |
2020年 | 3789篇 |
2019年 | 3033篇 |
2018年 | 3178篇 |
2017年 | 3116篇 |
2016年 | 2852篇 |
2015年 | 4464篇 |
2014年 | 5572篇 |
2013年 | 5304篇 |
2012年 | 7792篇 |
2011年 | 8498篇 |
2010年 | 5958篇 |
2009年 | 4930篇 |
2008年 | 5710篇 |
2007年 | 5412篇 |
2006年 | 5209篇 |
2005年 | 4528篇 |
2004年 | 3203篇 |
2003年 | 2802篇 |
2002年 | 2257篇 |
2001年 | 1866篇 |
2000年 | 1692篇 |
1999年 | 1723篇 |
1998年 | 1026篇 |
1997年 | 1009篇 |
1996年 | 745篇 |
1995年 | 641篇 |
1994年 | 585篇 |
1993年 | 371篇 |
1992年 | 456篇 |
1991年 | 371篇 |
1990年 | 301篇 |
1989年 | 339篇 |
1988年 | 237篇 |
1987年 | 266篇 |
1986年 | 150篇 |
1985年 | 144篇 |
1984年 | 104篇 |
1983年 | 61篇 |
1982年 | 51篇 |
1981年 | 58篇 |
1980年 | 41篇 |
1979年 | 44篇 |
1978年 | 36篇 |
1977年 | 20篇 |
1976年 | 15篇 |
1974年 | 23篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
中医学古籍中罕有关于“胰腺”的明确记载,缺乏直观、系统的理论论述。本文试图通过对各个时期具有代表性的医学典籍所记载内容的分析,结合现代解剖学相关理论,梳理中医学对胰腺实体解剖的认识过程。通过分析,笔者认为中医学对胰腺实体解剖的认识具有阶段性:①先秦两汉时期,存在胰腺实体解剖,但并非认为胰腺是脏器;②唐宋时期,胰腺实体解剖更加清晰,在医学上胰腺附属于脾,并非为独立的脏器;③明清时期,胰腺实体解剖明确,部分医家以独立脏器论之,出现“脾”、“胰”之争。中医学理论缺少对胰腺的单独论述,目前学界的主流观点多为“胰属脾”,线性归属以脾笼统代之略显单薄,不利于理论的丰富与发展。笔者认为胰腺藏象应独立于脾单独讨论,现代解剖学对胰腺命名同一,形态结构清楚,位置描述明确,可直接补充进中医学胰腺藏象(藏)理论中,为完善胰腺藏象理论搭建解剖学基础。 相似文献
2.
Background: Breast cancer (BC) is the most common malignant tumor in women, and its morbidity and mortality are
increasing each year, due to the lack of specific clinical symptoms in the early stage of BC, and the lack of diagnostic
methods for early breast cancer. Therefore, identifying an effective diagnostic method for early BC has become urgent.
Materials and Methods: Breast lesions with a histological diagnosis that were examined by ultrasonic elastography
(UE) in our department from June 2020 to December 2021 were reviewed. qRT-PCR was performed to measure
the expression levels of miR-144-5p and miR-26b-5p in the plasma of patients with BC. The receiver operating characteristics (ROC) curve and area under the curve (AUC) were used to investigate the potential diagnostic value of miR-
144-5p, miR-26b-5p and the elastographic score in BC. Results: The ultrasonic elastography score(UES) was found to
be significantly upregulated in BC compared with that in benign breast lesions, and the AUC, sensitivity and specificity
were 0.809, 0.717 and 0.806 for distinguishing BC from benign breast lesions, respectively. miR-144-5p and miR-26b-
5p were found to be upregulated in the plasma of BC patients, and miR-144-5p+miR-26b-5p had 0.781 sensitivity and
0.780 specificity for the diagnosis of BC. Furthermore, we found that the diagnostic performance of miR-144-5p and
miR-26b-5p combined with UES for BC had 0.913 sensitivity and 0.890 specificity. Conclusions: The combination of
plasma miR-144-5p, miR-26b-5p and UES has a very high clinical application value for the early detection of BC. 相似文献
3.
4.
目的分析细棒、PEEK棒固定对寰枢关节稳定性的影响。方法采用6具新鲜成人枕骨(occipital bone,Oc)~颈椎C4节段进行测试,模拟以下手术及固定状态:①完整状态;②损伤状态:枢椎齿状突II型骨折;③坚强固定:寰枢椎均采用普通椎弓根螺钉固定,直径3.5 mm钛棒连接;④PEEK棒:直径3.5 mm的PEEK棒连接;⑤细棒:直径2.0 mm钛棒连接。采用重复测量实验设计,在完整、损伤和不同的固定状态下,通过脊柱试验机对标本分别施加1.5 N·m的前屈/后伸、左/右侧弯和左/右轴向旋转的纯力偶矩。采用Optotrak三维运动测量系统连续采集标本运动,分析寰枢椎之间角度运动范围和中性区。结果采用直径3.5 mm的钛棒,2.0 mm的细棒以及3.5 mm的PEEK棒固定后,在前屈、后伸、侧弯和旋转方向上均显著减小了固定节段的运动范围(P<0.05)。直径3.5 mm和2.0 mm的棒固定后的运动范围,在各个方向上无显著性差异。PEEK棒固定的运动范围仅在侧弯方向上大于坚强固定(P=0.005),其他方向无显著性差异。3种固定方式在屈伸、侧弯和旋转方向上均显著减小了固定节段的中性区(P<0.05)。各种固定方式之间相比较,无显著性差异(P>0.05)。结论在寰枢关节采用直径2.0 mm的细棒固定,与坚强固定的稳定性相当。采用直径3.5 mm的PEEK棒固定,在前屈、后伸、旋转方向上与坚强固定的稳定性相当,在侧弯方向上弱于坚强固定。 相似文献
5.
6.
Yuxiang Ma Wenfeng Fang Hongyun Zhao Sai Praneeth Bathena Amol Tendolkar Jennifer Sheng Li Zhang 《The oncologist》2021,26(4):e549-e566
Lessons Learned
- The overall safety profiles of ipilimumab 3 mg/kg and 10 mg/kg administered every 3 weeks, were consistent between Chinese patients with solid tumors in the current study and patients from previous U.S. ipilimumab monotherapy studies. No new safety signals were identified.
- The mean systemic exposures to ipilimumab (assessed by first dose area under the curve during the dosing interval and maximum serum concentration) were numerically lower in the Chinese patient population than in U.S. patients for both 3 mg/kg and 10 mg/kg doses; however, the range of serum concentrations in the Chinese and U.S. populations overlapped (3 mg/kg and 10 mg/kg), suggesting that ipilimumab pharmacokinetics was ethnically insensitive in this study.
7.
Kara S. Tanaka MD Veronica R. Andaya BA Steven W. Thorpe MD Kenneth R. Gundle MD James B. Hayden MD Yee-Cheen Duong MD Raffi S. Avedian MD David G. Mohler MD Lee J. Morse MD Melissa N. Zimel MD Richard J. O'Donnell MD Andrew Fang MD Robert Lor Randall MD Tina H. Tran BS Christin New BA Rosanna L. Wustrack MD other members of Study Group FORCE 《Journal of surgical oncology》2023,127(1):148-158
8.
9.
10.
Xiying Fan Glen A. Bjerke Kent Riemondy Li Wang Rui Yi 《Molecular carcinogenesis》2019,58(12):2241-2253
MicroRNAs (miRNAs) play important roles in prostate cancer development. However, it remains unclear how individual miRNAs contribute to the initiation and progression of prostate cancer. Here we show that a basal layer‐enriched miRNA is required for prostate tumorigenesis. We identify miR‐205 as the most highly expressed miRNA and enriched in the basal cells of the prostate. Although miR‐205 is not required for normal prostate development and homeostasis, genetic deletion of miR‐205 in a Pten null tumor model significantly compromises tumor progression and does not promote metastasis. In Pten null basal cells, loss of miR‐205 attenuates pAkt levels and promotes cellular senescence. Furthermore, although overexpression of miR‐205 in prostate cancer cells with luminal phenotypes inhibits cell growth in both human and mouse, miR‐205 has a minimal effect on the growth of a normal human prostate cell line. Taken together, we have provided genetic evidence for a requirement of miR‐205 in the progression of Pten null‐induced prostate cancer. 相似文献