全文获取类型
收费全文 | 33077篇 |
免费 | 2411篇 |
国内免费 | 55篇 |
专业分类
耳鼻咽喉 | 303篇 |
儿科学 | 1181篇 |
妇产科学 | 962篇 |
基础医学 | 4276篇 |
口腔科学 | 430篇 |
临床医学 | 4343篇 |
内科学 | 5946篇 |
皮肤病学 | 471篇 |
神经病学 | 3537篇 |
特种医学 | 596篇 |
外国民族医学 | 4篇 |
外科学 | 2972篇 |
综合类 | 328篇 |
一般理论 | 45篇 |
预防医学 | 4616篇 |
眼科学 | 507篇 |
药学 | 2209篇 |
中国医学 | 23篇 |
肿瘤学 | 2794篇 |
出版年
2024年 | 44篇 |
2023年 | 293篇 |
2022年 | 517篇 |
2021年 | 1119篇 |
2020年 | 679篇 |
2019年 | 1035篇 |
2018年 | 1157篇 |
2017年 | 832篇 |
2016年 | 979篇 |
2015年 | 1005篇 |
2014年 | 1328篇 |
2013年 | 1870篇 |
2012年 | 2734篇 |
2011年 | 2953篇 |
2010年 | 1545篇 |
2009年 | 1296篇 |
2008年 | 2376篇 |
2007年 | 2376篇 |
2006年 | 2173篇 |
2005年 | 2042篇 |
2004年 | 1825篇 |
2003年 | 1575篇 |
2002年 | 1594篇 |
2001年 | 205篇 |
2000年 | 170篇 |
1999年 | 200篇 |
1998年 | 307篇 |
1997年 | 238篇 |
1996年 | 168篇 |
1995年 | 178篇 |
1994年 | 134篇 |
1993年 | 119篇 |
1992年 | 69篇 |
1991年 | 47篇 |
1990年 | 48篇 |
1989年 | 39篇 |
1988年 | 39篇 |
1987年 | 35篇 |
1986年 | 33篇 |
1985年 | 16篇 |
1984年 | 19篇 |
1983年 | 29篇 |
1982年 | 24篇 |
1981年 | 18篇 |
1980年 | 11篇 |
1978年 | 4篇 |
1977年 | 4篇 |
1973年 | 4篇 |
1972年 | 3篇 |
1942年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
Use of a run-in period to decrease loss to follow-up in the Contact Lens and Myopia Progression (CLAMP) study 总被引:1,自引:0,他引:1
Rigid gas permeable (RGP) contact lenses are initially less comfortable to wear than spectacles. In previous studies evaluating the use of RGP contact lenses to control myopia, more subjects randomly assigned to wear RGP contact lenses have been lost to follow-up than spectacle wearers. Previous rigid contact lens myopia control studies have lost 44% and 47% of the rigid contact lens wearers. This unequal loss to follow-up may compromise the results of the study, so we conducted a run-in period prior to randomized treatment-group assignment to ensure that all participants could adapt to RGP contact lens wear. We enrolled 147 children ages 8-11 years with myopia in the run-in period. Of the 147 subjects, 116 (78.9%) were able to wear RGP contact lenses for at least 40 hours per week and reported that they were "usually comfortable" or "always comfortable." After 3 years, no subjects were lost to follow-up. The run-in period greatly reduced the loss to follow-up suffered by previous RGP contact lens myopia progression studies and may help provide more definitive answers regarding myopia control with RGP contact lenses. 相似文献
992.
993.
Duncan Amie Meinzen-Derr Jareen Ruble Lisa A. Fassler Carrie Stark Lori J. 《Journal of autism and developmental disorders》2022,52(2):938-949
Journal of Autism and Developmental Disorders - Adolescents with autism spectrum disorder (ASD) without an intellectual disability have daily living skills (DLS) impairments. An initial feasibility... 相似文献
994.
Biallelic AOPEP Loss-of-Function Variants Cause Progressive Dystonia with Prominent Limb Involvement
Michael Zech MD Kishore R. Kumar MBBS PhD FRACP Sophie Reining MD Janine Reunert PhD Michel Tchan MBBS PhD FRACP Lisa G. Riley PhD Alexander P. Drew PhD Robert J. Adam MA MBBS PhD FRACP FRCP Riccardo Berutti PhD Saskia Biskup MD Nicolas Derive PhD Somayeh Bakhtiari PhD Sheng Chih Jin PhD Michael C. Kruer MD Tanya Bardakjian MS Pedro Gonzalez-Alegre MD PhD Ignacio J. Keller Sarmiento MD Niccolo E. Mencacci MD PhD Steven J. Lubbe PhD Manju A. Kurian PhD Fabienne Clot PhD Aurélie Méneret MD PhD Jean-Madeleine de Sainte Agathe MD Victor S.C. Fung MBBS PhD FRACP Marie Vidailhet MD Matthias Baumann MD Thorsten Marquardt MD Juliane Winkelmann MD Sylvia Boesch MD 《Movement disorders》2022,37(1):137-147
995.
Parker Phil Banbury Sam de Rijk Lisa 《International journal of mental health and addiction》2022,20(4):2382-2399
International Journal of Mental Health and Addiction - There is a developing interest in recovery-based approaches, positive psychology and the importance of flourishing in alcohol use disorders... 相似文献
996.
Courtney LR 《Emergency Medicine Clinics of North America》2004,22(1):153-165
Being able to hire the right team members, keeping them engaged ina professional and productive environment, and avoiding litigation help keep the team functioning and meeting the everyday goals of providing quality patient care. Although these topics may seem complex, medical providers and professionals have resources available to them, such as the Human Resources department, the Medical Director, senior management,and legal counsel.Hiring the right people, creating a positive work environment, and avoiding litigation are all common sense principals that are relevant regardless of profession, industry, or company. Understanding how to apply the principles and concepts of Human Resources and personnel management can seem overwhelming: however, asking for help from the resources mentioned previously and applying the common sense information found in this article will help one to be a successful leader and practitioner. 相似文献
997.
Kate Fox Hamish Meffin Owen Burns Carla J. Abbott Penelope J. Allen Nicholas L. Opie Ceara McGowan Jonathan Yeoh Arman Ahnood Chi D. Luu Rosemary Cicione Alexia L. Saunders Michelle McPhedran Lisa Cardamone Joel Villalobos David J. Garrett David A. X. Nayagam Nicholas V. Apollo Kumaravelu Ganesan Mohit N. Shivdasani Alastair Stacey Mathilde Escudie Samantha Lichter Robert K. Shepherd Steven Prawer 《Artificial organs》2016,40(3):E12-E24
Successful visual prostheses require stable, long‐term attachment. Epiretinal prostheses, in particular, require attachment methods to fix the prosthesis onto the retina. The most common method is fixation with a retinal tack; however, tacks cause retinal trauma, and surgical proficiency is important to ensure optimal placement of the prosthesis near the macula. Accordingly, alternate attachment methods are required. In this study, we detail a novel method of magnetic attachment for an epiretinal prosthesis using two prostheses components positioned on opposing sides of the retina. The magnetic attachment technique was piloted in a feline animal model (chronic, nonrecovery implantation). We also detail a new method to reliably control the magnet coupling force using heat. It was found that the force exerted upon the tissue that separates the two components could be minimized as the measured force is proportionately smaller at the working distance. We thus detail, for the first time, a surgical method using customized magnets to position and affix an epiretinal prosthesis on the retina. The position of the epiretinal prosthesis is reliable, and its location on the retina is accurately controlled by the placement of a secondary magnet in the suprachoroidal location. The electrode position above the retina is less than 50 microns at the center of the device, although there were pressure points seen at the two edges due to curvature misalignment. The degree of retinal compression found in this study was unacceptably high; nevertheless, the normal structure of the retina remained intact under the electrodes. 相似文献
998.
Emily English Megan Solomon Bertha Chen Lisa Rogo-Gupta 《International urogynecology journal》2016,27(12):1905-1911
Introduction and hypothesis
Complications of pelvic organ prolapse and urinary incontinence surgery have gained increasing attention from both lay media and medical societies. The International Urogynecological Association and International Continence Society proposed the category–time–site system to classify complications in 2011. Our objective is to assess the usage of the category–time–site system in the literature.Methods
We conducted a systematic review and identified records using PubMed search terms “mesh” and “prolapse or incontinence” and “complication or excision” (February 2011 to December 2015) to select publications following the introduction of category–time–site system. Relevant publications were included and reviewed for study design, initial procedure, number of patients assigned codes, number of unique codes applied, purpose of assigning codes, and duration of clinical follow-up.Results
Of 167 eligible records, 23 (14 %) used the system, 137 (82 %) used no system, and 7 (4 %) used another system. They included three study designs: randomized control trials, case reports, and case series. Given the very limited amount of data, no statistical tests were performed, but trends were noted.Conclusions
Fourteen percent of the reports in the literature describing complications related to prosthesis/graft use in pelvic surgery utilize the category–time–site system. The system’s limited and inconsistent use hinders the ability to draw conclusions useful for clinical practice. Effort should be directed toward improving appropriate usage or revising the system to increase its exposure in related publications. An improved system will better prepare pelvic surgeons for assessing future generations of prostheses/grafts.999.
Exosomal particles secreted by prostate cancer cells are potent mRNA and protein vehicles for the interference of tumor and tumor environment 下载免费PDF全文
1000.
Split face evaluation of long‐pulsed non‐ablative 1,064 nm Nd:YAG laser for treatment of direct browplasty scars 下载免费PDF全文