全文获取类型
收费全文 | 4367篇 |
免费 | 297篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 22篇 |
儿科学 | 98篇 |
妇产科学 | 52篇 |
基础医学 | 752篇 |
口腔科学 | 79篇 |
临床医学 | 423篇 |
内科学 | 752篇 |
皮肤病学 | 85篇 |
神经病学 | 781篇 |
特种医学 | 197篇 |
外科学 | 389篇 |
综合类 | 9篇 |
一般理论 | 3篇 |
预防医学 | 309篇 |
眼科学 | 54篇 |
药学 | 294篇 |
中国医学 | 6篇 |
肿瘤学 | 373篇 |
出版年
2024年 | 8篇 |
2023年 | 55篇 |
2022年 | 92篇 |
2021年 | 160篇 |
2020年 | 110篇 |
2019年 | 155篇 |
2018年 | 148篇 |
2017年 | 126篇 |
2016年 | 150篇 |
2015年 | 174篇 |
2014年 | 221篇 |
2013年 | 233篇 |
2012年 | 414篇 |
2011年 | 401篇 |
2010年 | 228篇 |
2009年 | 218篇 |
2008年 | 322篇 |
2007年 | 312篇 |
2006年 | 280篇 |
2005年 | 225篇 |
2004年 | 202篇 |
2003年 | 186篇 |
2002年 | 137篇 |
2001年 | 19篇 |
2000年 | 17篇 |
1999年 | 19篇 |
1998年 | 23篇 |
1997年 | 9篇 |
1996年 | 12篇 |
1995年 | 9篇 |
1994年 | 5篇 |
1993年 | 4篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1981年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有4678条查询结果,搜索用时 0 毫秒
61.
Nicole K. Paulk Katja Pekrun Erhua Zhu Sean Nygaard Bin Li Jianpeng Xu Kirk Chu Christian Leborgne Allison P. Dane Annelise Haft Yue Zhang Feijie Zhang Chris Morton Marcus B. Valentine Andrew M. Davidoff Amit C. Nathwani Federico Mingozzi Markus Grompe Mark A. Kay 《Molecular therapy》2018,26(1):289-303
62.
Marthe M. de Jonge Dina Ruano Ronald van Eijk Nienke van der Stoep Maartje Nielsen Juul T. Wijnen Natalja T. ter Haar Astrid Baalbergen Monique E.M.M. Bos Marjolein J. Kagie Maaike P.G. Vreeswijk Katja N. Gaarenstroom Judith R. Kroep Vincent T.H.B.M. Smit Tjalling Bosse Tom van Wezel Christi J. van Asperen 《The Journal of molecular diagnostics : JMD》2018,20(5):600-611
63.
64.
65.
66.
67.
68.
Abdominal infections in patients with acute leukaemia: a prospective study applying ultrasonography and microbiology 总被引:1,自引:0,他引:1
Gorschlüter M Marklein G Höfling K Clarenbach R Baumgartner S Hahn C Ziske C Mey U Heller R Eis-Hübinger AM Sauerbruch T Schmidt-Wolf IG Glasmacher A 《British journal of haematology》2002,117(2):351-358
A prospective study of 62 chemotherapy-induced neutropenic episodes in patients with acute leukaemia was conducted to determine the incidence and causes of abdominal infections, and to assess the diagnostic value of the combined use of ultrasonography (US) and microbiology. Each patient underwent US of liver, gallbladder and complete bowel before chemotherapy, on days 2-4 after the end of chemotherapy and in cases of fever, diarrhoea or abdominal pain. US was combined with a standardized clinical examination and a broad spectrum of microbiological investigations. From January to August 2001, 243 US examinations were performed. The overall incidence of abdominal infectious diseases was 17.7% (11 out of 62, 95% confidence interval (CI): 9-29%). Four patients (6.5%) developed neutropenic enterocolitis; two of them died, two survived. Bowel wall thickening (BWT) > 4 mm in these four patients ranged from 5.8 to 23.6 mm and was detected only in one patient with mucositis. In three other patients (4.8%) Clostridium difficile, and in one patient (1.6%) Campylobacter jejuni, caused enterocolitis without BWT. Cholecystitis was diagnosed in three patients (4.8%) and hepatic candidiasis was strongly suspected in one patient. Abdominal infections caused by gastroenteritis viruses, cytomegalovirus (CMV) or Cryptosporidium were not observed. We conclude that in neutropenic patients with acute leukaemia receiving chemotherapy: (i) BWT is not a feature of chemotherapy-induced mucositis and should therefore be considered as sign of infectious enterocolitis; (ii) viruses, classic bacterial enteric pathogens (Salmonella, Shigella, Yersinia, Campylobacter, Aeromonas, Vibrio subsp., enterohaemorrhagic Escherichia coli) and Cryptosporidium have a very low incidence; and (iii) abdominal infections may be underestimated when US is not used in every patient with abdominal pain. 相似文献
69.
Visser J. Carolina Wibier Lisa Mekhaeil Marina Woerdenbag Herman J. Taxis Katja 《International journal of clinical pharmacy》2020,42(2):436-444
International Journal of Clinical Pharmacy - Background A frequent problem in ageing patients, and thus in nursing home residents, is dysphagia, affecting the ability to swallow solid dosage forms.... 相似文献
70.
Franziska Gaunitz Tobias Kieliba Mario Thevis Katja Mercer‐Chalmers‐Bender 《Drug testing and analysis》2020,12(1):27-40
This article comprises the development and validation of a protocol for the qualitative analysis of 61 phase I synthetic cannabinoid metabolites in urine originating from 29 synthetic cannabinoids, combining solid‐phase extraction (SPE) utilizing a reversed phase silica‐based sorbent (phenyl) with liquid chromatography–tandem mass spectrometry (LC?MS/MS). Validation was performed according to the guidelines of the German Society of Toxicological and Forensic Chemistry. Sufficient chromatographic separation was achieved within a total runtime of 12.3 minutes. Validation included specificity and selectivity, limit of detection (LOD), recovery and matrix effects, as well as auto‐sampler stability of processed urine samples. LOD ranged between 0.025 ng/mL and 0.5 ng/mL in urine. Recovery ranged between 43% and 97%, with only two analytes exhibiting recoveries below 50%. However, for those two analytes, the LODs were 0.05 ng/mL in urine. In addition, matrix effects between 81% and 185% were determined, whereby matrix effects over 125% were observed for 10 non‐first‐generation synthetic cannabinoid metabolites. The developed method enables the rapid and sensitive detection of synthetic cannabinoid metabolites in urine, complementing the spectrum of existing analytical tools in forensic case work. Finally, application to 61 urine samples from both routine and autopsy case work yielded one urine sample that tested positive for ADB‐PINACA N‐pentanoic acid. 相似文献