全文获取类型
收费全文 | 5326篇 |
免费 | 246篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 40篇 |
儿科学 | 202篇 |
妇产科学 | 92篇 |
基础医学 | 600篇 |
口腔科学 | 137篇 |
临床医学 | 436篇 |
内科学 | 895篇 |
皮肤病学 | 73篇 |
神经病学 | 386篇 |
特种医学 | 190篇 |
外科学 | 648篇 |
综合类 | 62篇 |
一般理论 | 4篇 |
预防医学 | 239篇 |
眼科学 | 194篇 |
药学 | 636篇 |
1篇 | |
中国医学 | 75篇 |
肿瘤学 | 673篇 |
出版年
2023年 | 27篇 |
2022年 | 103篇 |
2021年 | 177篇 |
2020年 | 91篇 |
2019年 | 117篇 |
2018年 | 153篇 |
2017年 | 91篇 |
2016年 | 131篇 |
2015年 | 170篇 |
2014年 | 211篇 |
2013年 | 300篇 |
2012年 | 477篇 |
2011年 | 447篇 |
2010年 | 241篇 |
2009年 | 234篇 |
2008年 | 337篇 |
2007年 | 335篇 |
2006年 | 327篇 |
2005年 | 327篇 |
2004年 | 286篇 |
2003年 | 246篇 |
2002年 | 203篇 |
2001年 | 52篇 |
2000年 | 56篇 |
1999年 | 51篇 |
1998年 | 42篇 |
1997年 | 21篇 |
1996年 | 32篇 |
1995年 | 35篇 |
1994年 | 27篇 |
1993年 | 28篇 |
1992年 | 28篇 |
1991年 | 27篇 |
1990年 | 14篇 |
1989年 | 14篇 |
1988年 | 7篇 |
1987年 | 6篇 |
1986年 | 5篇 |
1985年 | 10篇 |
1984年 | 13篇 |
1983年 | 8篇 |
1982年 | 8篇 |
1981年 | 10篇 |
1980年 | 11篇 |
1979年 | 6篇 |
1978年 | 3篇 |
1976年 | 4篇 |
1973年 | 3篇 |
1972年 | 3篇 |
1971年 | 5篇 |
排序方式: 共有5583条查询结果,搜索用时 15 毫秒
101.
102.
103.
Vedantham S 《American journal of hematology》2012,87(Z1):S113-S118
The last decade has seen increased use of aggressive, catheter-based methods of treating deep vein thrombosis (DVT). In this article, we outline the risks, benefits, and uncertainties surrounding endovascular DVT therapies, describe clinical situations in which endovascular treatment options should reasonably be considered, and update the reader on new outcome data that pertains to catheter-based DVT interventions. Endovascular thrombolytic therapy is reasonable to perform for selected patients with DVT causing acute limb-threatening circulatory compromise, acute inferior vena cava occlusion, or acute iliofemoral DVT for the purposes of limb salvage and relief of presenting DVT symptoms, and appears likely to prevent post-thrombotic syndrome (PTS) in patients with proximal DVT. A multicenter randomized trial, the ATTRACT Study, is currently underway in the United States to determine whether pharmacomechanical catheter-directed thrombolysis (PCDT) is sufficiently safe and effective to be recommended for routine use in proximal DVT patients. Selected patients with established moderate-to-severe PTS in association with an occluded iliac vein or a refluxing saphenous vein may also be amenable to endovascular intervention to reduce venous hypertension, alleviate symptoms, and improve limb function and quality of life. Pending the results of further studies, an individualized approach to patient selection for interventional DVT therapies is recommended. 相似文献
104.
Extraosseous Ewing's sarcoma/primitive neuroectodermal tumor (ES/PNET) is an uncommon, aggressive, and malignant tumor with a poor patient outcome. Its occurrence in the lesser sac is a rare event and to the best of our knowledge, has not been previously described. The present case was clinically and radiologically misdiagnosed as a pancreatic tumor/gastrointestinal stromal tumor. Histopathology revealed a tumor with "small round cells" that were positive for CD99, confirming the diagnosis of ES/PNET. This report highlights the importance of considering Ewing's sarcoma in the differential diagnosis of intraabdominal, extraintestinal masses. 相似文献
105.
David R. Hansberry Ragha Suresh Nitin Agarwal Robert F. Heary Ira M. Goldstein 《Journal of the peripheral nervous system : JPNS》2013,18(1):44-47
Given its practicality, the internet is a primary resource for patients afflicted with diseases like peripheral neuropathy. Therefore, it is important that the readily available online resources on peripheral neuropathy are tailored to the general public, particularly concerning readability. Patient education resources were downloaded from the US National Library of Medicine, Mayo Clinic, National Institute of Neurological Disorders and Stroke, Neuropathy.org , GBS/CIDP Foundation International, Hereditary Neuropathy Foundation, Charcot‐Marie‐Tooth Association, Foundation for Peripheral Neuropathy, and Neuropathy Action Foundation websites. All patient education material related to peripheral neuropathy was evaluated for its level of readability using the Flesch Reading Ease (FRE) and Flesch‐Kincaid Grade Level. The FRE scores averaged 43.4 with only the US National Library of Medicine scoring above 60 (76.5). The Flesch‐Kincaid Grade Level scores averaged 11.0. All scores were above a seventh‐grade level except the US National Library of Medicine, which had a score of a fifth‐grade reading level. Most Americans may not fully benefit from patient education resources concerning peripheral neuropathy education on many of the websites. Only the US National Library of Medicine, which is written at a fifth‐grade level, is likely to benefit the average American. 相似文献
106.
107.
RR Pillai R Divekar A Brasier S Bhavnani WJ Calhoun 《Current allergy and asthma reports》2012,12(5):388-395
Asthma is a chronic inflammatory disease of the airways that leads to various degrees of recurrent respiratory symptoms affecting patients globally. Specific subgroups of asthma patients have severe disease leading to increased healthcare costs and socioeconomic burden. Despite the overwhelming prevalence of the asthma, there are limitations in predicting response to therapy and identifying patients who are at increased risk of morbidity. This syndrome presents with common clinical signs and symptoms; however, awareness of subgroups of asthma patients with distinct characteristics has surfaced in recent years. Investigators attempt to describe the phenotypes of asthma to ultimately assist with diagnostic and therapeutic applications. Approaches to asthma phenotyping are multifold; however, it can be partitioned into 2 essential groups, clinical phenotyping and molecular phenotyping. Innovative techniques such as bipartite network analysis and visual analytics introduce a new dimension of data analysis to identify underlying mechanistic pathways. 相似文献
108.
K Kiran Kumar UC Sampritha Akshata A Prakash Karishma Adappa S Chandraprabha TG Neeraja N S Guru Prasad Jessica Basumatary Suresh Babu Gangasagara B L Sujatha Rathod Chakravarthy Raghunathan Jayanthi 《Indian journal of ophthalmology》2021,69(3):691
Purpose:The aim of this study was to determine the frequency and various types of ophthalmic manifestation of patients with COVID-19.Methods:This is a prospective observational study conducted on patients with SARS-Co-V-2 infection, at a dedicated tertiary COVID-19 hospital in South India from April 1 to July 31, 2020. At the time of their admission to the COVID hospital, demographic data such as name, age, sex was recorded. A thorough history regarding the onset, duration, progression, nature of symptoms and its associated factors, medication history, treatment history were elicited and documented. Ocular examination was performed under torchlight by an ophthalmologist posted for COVID duty. Further investigations including imaging were sought for, depending on clinical indications. Serial follow-up examinations of all patients were carried out every 72 hours or when patients complained of any ocular symptoms whichever earlier, until discharge. All relevant data were compiled and statistically analyzed.Results:A total of 2742 patients were examined. Of them, 1461 (53.28%) were males and 1281 (46.72%) were females. The mean age (±SD) was 39.46 ± 17.63 years. None of the patients in our study had any ocular symptoms or signs as the presenting complaint at the time of their admission. On subsequent follow-up, only 20 (0.72%) developed ocular manifestations, of which 19 (95%) had features suggestive of Bilateral viral conjunctivitis. However, 1 (5%) patient had orbital cellulitis secondary to pansinusitis.Conclusion:Ophthalmic manifestations in the clinical spectrum of COVID-19 infection are uncommon and unlikely to be the presenting clinical impression. However, it has broadened our view to a wider spectrum of COVID-19 presentations enhancing our clinical acumen for staunch detection of COVID-19 suspects in our daily practice, augmenting early diagnosis and management and also break the chain of transmission for the greater good of humanity. 相似文献
109.
110.
Singireddi Srinivasarao Adinarayana Nandikolla Amaroju Suresh Kevin Van Calster Linda De Vooght Davie Cappoen Balaram Ghosh Himanshu Aggarwal Sankaranarayanan Murugesan Kondapalli Venkata Gowri Chandra Sekhar 《RSC advances》2020,10(32):18907
Correction for ‘Seeking potent anti-tubercular agents: design and synthesis of substituted-N-(6-(4-(pyrazine-2-carbonyl)piperazine/homopiperazine-1-yl)pyridin-3-yl)benzamide derivatives as anti-tubercular agents’ by Singireddi Srinivasarao et al., RSC Adv., 2020, 10, 12272–12288, DOI: 10.1039/D0RA01348J.The authors regret that the name of one of the authors (Linda De Vooght) was shown incorrectly in the original article. The corrected author list is as shown above.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers. 相似文献