全文获取类型
收费全文 | 114459篇 |
免费 | 8730篇 |
国内免费 | 397篇 |
专业分类
耳鼻咽喉 | 1191篇 |
儿科学 | 3053篇 |
妇产科学 | 2117篇 |
基础医学 | 15993篇 |
口腔科学 | 2331篇 |
临床医学 | 12507篇 |
内科学 | 23525篇 |
皮肤病学 | 1964篇 |
神经病学 | 12091篇 |
特种医学 | 4426篇 |
外国民族医学 | 6篇 |
外科学 | 15668篇 |
综合类 | 1535篇 |
一般理论 | 98篇 |
预防医学 | 9942篇 |
眼科学 | 1896篇 |
药学 | 7785篇 |
1篇 | |
中国医学 | 133篇 |
肿瘤学 | 7324篇 |
出版年
2023年 | 659篇 |
2022年 | 522篇 |
2021年 | 2506篇 |
2020年 | 1564篇 |
2019年 | 2357篇 |
2018年 | 2866篇 |
2017年 | 2055篇 |
2016年 | 2493篇 |
2015年 | 2847篇 |
2014年 | 3775篇 |
2013年 | 4982篇 |
2012年 | 7768篇 |
2011年 | 7842篇 |
2010年 | 4494篇 |
2009年 | 4087篇 |
2008年 | 6826篇 |
2007年 | 7372篇 |
2006年 | 6851篇 |
2005年 | 6731篇 |
2004年 | 6310篇 |
2003年 | 5639篇 |
2002年 | 5511篇 |
2001年 | 1990篇 |
2000年 | 1847篇 |
1999年 | 1760篇 |
1998年 | 1332篇 |
1997年 | 1073篇 |
1996年 | 878篇 |
1995年 | 880篇 |
1994年 | 762篇 |
1993年 | 695篇 |
1992年 | 1194篇 |
1991年 | 1104篇 |
1990年 | 1026篇 |
1989年 | 990篇 |
1988年 | 879篇 |
1987年 | 831篇 |
1986年 | 862篇 |
1985年 | 840篇 |
1984年 | 671篇 |
1983年 | 594篇 |
1982年 | 568篇 |
1981年 | 473篇 |
1980年 | 395篇 |
1979年 | 529篇 |
1978年 | 404篇 |
1977年 | 363篇 |
1975年 | 331篇 |
1974年 | 360篇 |
1973年 | 349篇 |
排序方式: 共有10000条查询结果,搜索用时 16 毫秒
51.
52.
Darren R. Feldman MD Yasser Ged MBBS Chung-Han Lee PhD Andrea Knezevic MS Ana M. Molina MD Ying-Bei Chen PhD Joshua Chaim DO Devyn T. Coskey MS Samuel Murray MS Satish K. Tickoo MD Victor E. Reuter MD Sujata Patil PhD Han Xiao MD Jahan Aghalar MD Arlyn J. Apollo MD Maria I. Carlo MD Robert J. Motzer MD Martin H. Voss MD 《Cancer》2020,126(24):5247-5255
53.
54.
Martin Freesmeyer Christian Kühnel Falk Gühne Philipp Seifert 《Journal of ultrasound in medicine》2019,38(12):3311-3319
Fine‐needle aspiration cytology using a novel ultrasound needle guidance system on the basis of standard needle magnetization was consecutively performed in 30 (15 in‐plane and 15 out‐of‐plane) suspicious thyroid nodules. Nondedicated, commercially available needles were used. The technical effectiveness and safety of the system were satisfying; system failures were observed in 2 cases. The needle tip could be (at least occasionally) visualized inside the thyroid nodule in 96%, and the subjective procedure ratings were excellent in 57%. The out‐of‐plane technique was significantly superior in both respects (P = .021 and .027, respectively). Standard needle magnetization ultrasound needle guidance was easy to apply and cost‐effective and has the potential to improve fine‐needle aspiration cytology performance. 相似文献
55.
Martin J. Kurian Peter J. Rentzepis Ann M. Carracher Kelly L. Close 《Journal of Diabetes》2019,11(9):700-702
Martin J. Kurian, Peter J. Rentzepis, Ann M. Carracher, and Kelly L. Close are of Close Concerns ( http://www.closeconcerns.com ), a healthcare information company focused exclusively on diabetes and obesity care. Close Concerns publishes Closer Look, a periodical that brings together news and insights in these areas. Each month, the Journal of Diabetes includes this News feature, in which Kurian, Rentzepis, Carracher, and Close review the latest developments relevant to researchers and clinicians. 相似文献
56.
Kimberly B. Glazer Kendrin R. Sonneville Nadia Micali Sonja A. Swanson Ross Crosby Nicholas J. Horton Kamryn T. Eddy Alison E. Field 《The Journal of adolescent health》2019,64(2):165-171
Purpose
To quantify eating disorder (ED) stability and diagnostic transition among a community-based sample of adolescents and young adult females in the United States.Methods
Using 11 prospective assessments from 9,031 U.S. females ages 9–15 years at baseline of the Growing Up Today Study, we classified cases of the following EDs involving bingeing and purging: bulimia nervosa (BN), binge ED, purging disorder (PD), and subthreshold variants defined by less frequent (monthly vs. weekly) bingeing and purging behaviors. We measured number of years symptomatic and probability of maintaining symptoms, crossing to another diagnosis, or resolving symptoms across consecutive surveys.Results
Study lifetime disorder prevalence was 2.1% for BN and roughly 6% each for binge ED and PD. Most cases reported symptoms during only one survey year. Twenty-six percent of cases crossed between diagnoses during follow-up. Among participants meeting full threshold diagnostic criteria, transition from BN was most prevalent, crossing most frequently from BN to PD (12.9% of BN cases). Within each disorder phenotype, 20%–40% of cases moved between subthreshold and full threshold criteria across consecutive surveys.Conclusions
Diagnostic crossover is not rare among adolescent and young adult females with an ED. Transition patterns from BN to PD add support for considering these classifications in the same diagnostic category of disorders that involve purging. The prevalence of crossover between monthly and weekly symptom frequency suggests that a continuum or staging approach may increase utility of ED classification for prognostic and therapeutic intervention. 相似文献57.
58.
59.
60.
Zaher H. Sbeity Axel Jaksche Sybille Martin Karin U. Loeffler 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2006,244(7):883-884
Purpose We report a case of periocular subcutaneous macrofilariasis as an initial sign of a systemic Loa loa infection.Methods Thorough history, eye examination and surgical intervention. Parasitological and serological analysis.Results A periocular adult Loa loa worm was extracted from the left upper eyelid in an African student living in Germany after presenting to our department with intermittent attacks of painful lid swelling. Four weeks later he presented with Calabar swellings in his arms without serological evidence of microfilaria and was treated with diethylcarbamazine.Conclusion Due to increasing migration of populations to Europe rare manifestations of ocular loiasis are becoming more common. Intermittent painful eyelid swelling in patients who visited or have lived in Africa should always raise the suspicion of systemic loiasis. 相似文献