全文获取类型
| 收费全文 | 13761篇 |
| 免费 | 871篇 |
| 国内免费 | 90篇 |
专业分类
| 耳鼻咽喉 | 145篇 |
| 儿科学 | 294篇 |
| 妇产科学 | 143篇 |
| 基础医学 | 1565篇 |
| 口腔科学 | 231篇 |
| 临床医学 | 1273篇 |
| 内科学 | 3294篇 |
| 皮肤病学 | 254篇 |
| 神经病学 | 758篇 |
| 特种医学 | 381篇 |
| 外国民族医学 | 3篇 |
| 外科学 | 2496篇 |
| 综合类 | 311篇 |
| 现状与发展 | 1篇 |
| 一般理论 | 14篇 |
| 预防医学 | 884篇 |
| 眼科学 | 306篇 |
| 药学 | 1237篇 |
| 中国医学 | 197篇 |
| 肿瘤学 | 935篇 |
出版年
| 2024年 | 16篇 |
| 2023年 | 188篇 |
| 2022年 | 539篇 |
| 2021年 | 910篇 |
| 2020年 | 516篇 |
| 2019年 | 631篇 |
| 2018年 | 674篇 |
| 2017年 | 422篇 |
| 2016年 | 462篇 |
| 2015年 | 547篇 |
| 2014年 | 678篇 |
| 2013年 | 732篇 |
| 2012年 | 1165篇 |
| 2011年 | 1119篇 |
| 2010年 | 619篇 |
| 2009年 | 514篇 |
| 2008年 | 748篇 |
| 2007年 | 746篇 |
| 2006年 | 661篇 |
| 2005年 | 621篇 |
| 2004年 | 511篇 |
| 2003年 | 494篇 |
| 2002年 | 320篇 |
| 2001年 | 110篇 |
| 2000年 | 101篇 |
| 1999年 | 73篇 |
| 1998年 | 75篇 |
| 1997年 | 37篇 |
| 1996年 | 48篇 |
| 1995年 | 27篇 |
| 1994年 | 28篇 |
| 1993年 | 30篇 |
| 1992年 | 36篇 |
| 1991年 | 28篇 |
| 1990年 | 22篇 |
| 1989年 | 24篇 |
| 1988年 | 21篇 |
| 1987年 | 17篇 |
| 1986年 | 9篇 |
| 1985年 | 28篇 |
| 1984年 | 20篇 |
| 1983年 | 19篇 |
| 1982年 | 25篇 |
| 1981年 | 22篇 |
| 1980年 | 11篇 |
| 1979年 | 6篇 |
| 1978年 | 16篇 |
| 1977年 | 7篇 |
| 1973年 | 6篇 |
| 1972年 | 7篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
1.
Kow Chia Siang Ramachandram Dinesh Sangarran Hasan Syed Shahzad 《Journal of thrombosis and thrombolysis》2022,54(2):217-218
Journal of Thrombosis and Thrombolysis - 相似文献
2.
Syed M. Gilani Muhammad Khan Andrea Barbieri Manju L. Prasad 《Diagnostic Histopathology》2021,27(6):263-271
Anaplastic thyroid carcinoma (ATC) is an aggressive thyroid malignancy with high mortality rate. This malignancy arises in thyroid follicular cells either denovo or with an associated differentiated thyroid carcinoma component. Clinically, it usually presents as a rapidly enlarging mass, pain and locally compressive symptoms. Histopathologic variability and heterogeneity often pose diagnostic challenges, especially in scant and paucicellular specimens. This article describes the clinical, histopathologic and molecular features of ATC and also addresses the associated diagnostic limitations and challenges. 相似文献
3.
4.
5.
6.
Turnbull Chris D. Stockley James A. Madathil Shyam Huq Syed S. A. Cooper Brendan G. Ali Asad Wharton Simon Stradling John R. Heitmar Rebekka 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2022,260(7):2129-2139
Graefe's Archive for Clinical and Experimental Ophthalmology - Retinal microvascular endothelial dysfunction is thought to be of importance in the development of ocular vascular diseases.... 相似文献
7.
8.
9.
Shafqat R. Chaudhry Ilana S. Lendvai Sajjad Muhammad Philipp Westhofen Johannes Kruppenbacher Lukas Scheef Henning Boecker Dirk Scheele Rene Hurlemann Thomas M. Kinfe 《Brain stimulation》2019,12(3):643-651
Objective
To assay peripheral inter-ictal cytokine serum levels and possible relations with non-invasive vagus nerve stimulation (nVNS) responsiveness in migraineurs.Methods
This double-blinded, sham-controlled study enrolled 48 subjects and measured headache severity, frequency [headache days/month, number of total and mild/moderate/severe classified attacks/month], functional state [sleep, mood, body weight, migraine-associated disability] and serum levels of inflammatory markers [inter-ictal] using enzyme-linked immunoassays at baseline and after 2 months of adjunctive nVNS compared to sham stimulation and suitably matched controls.Results
No significant differences were observed at baseline and after 2 months for headache severity, total attacks/month, headache days/month and functional outcome [sleep, mood, disability] between verum and sham nVNS. However, the number of severe attacks/month significantly decreased in the verum nVNS group and circulating pro-inflammatory IL-1β was elevated significantly in the sham group compared to nVNS. Levels of anti-inflammatory IL-10 were significantly higher at baseline in both groups compared to healthy controls, but not at 2 months follow-up [p?<?0.05]. Concentrations of high-mobility group box-1 (HMGB-1), IL-6, tumor-necrosis factor-α (TNF-α), leptin, adiponectin, ghrelin remained unchanged [p?>?0.05]. No severe device-/stimulation-related adverse events occurred.Conclusion
2 months of adjunctive cervical nVNS significantly declined the number of severe attacks/month. Pro-inflammatory IL-1β plasma levels [inter-ictal] were higher in sham-treated migraine patients compared to verum nVNS. However, pro- [IL-6, HMGB-1, TNF-α, leptin] and anti-inflammatory [IL-10, adiponectin, ghrelin] mediators did not differ statistically. Profiling of neuroinflammatory circuits in migraine to predict nVNS responsiveness remains an experimental approach, which may be biased by pre-analytic variables warranting large-scale biobank-based systematic investigations [omics]. 相似文献10.
Leandro Viçosa Bonetti Syed A. Hassan Sin-Tung Lau Luana T. Melo Takako Tanaka Kara K. Patterson 《The International journal of neuroscience》2019,129(2):195-203
Purpose of the study: the aim of this study was to synthesize PFC fNIRS outcomes on the effects of cognitive tasks compared to resting/baseline tasks in healthy adults from studies utilizing a pre/post design.
Material and methods: original research studies were searched from seven databases (MEDLINE, EMBASE, CENTRAL, CINAHL, SCOPUS, PEDro and PubMed). Subsequently, two independent reviewers screened the titles and abstracts followed by full-text reviews to assess the studies' eligibility.
Results: eleven studies met the inclusion criteria and had data abstracted and quality assessed. Methodology varied considerably and yet cognitive tasks resulted in the ΔO2Hb increasing in 8 of the 11 and ΔHHb decreasing in 8 of 8 studies that reported this outcome. The cognitive tasks from 10 of the 11 studies were classified as “Working Memory” and “Verbal Fluency Tasks”.
Conclusions: although, the data comparison was challenging provided the heterogeneity in methodology, the results across studies were similar. 相似文献