全文获取类型
收费全文 | 38808篇 |
免费 | 2094篇 |
国内免费 | 47篇 |
专业分类
耳鼻咽喉 | 594篇 |
儿科学 | 1610篇 |
妇产科学 | 614篇 |
基础医学 | 5088篇 |
口腔科学 | 949篇 |
临床医学 | 2420篇 |
内科学 | 9575篇 |
皮肤病学 | 1318篇 |
神经病学 | 3225篇 |
特种医学 | 957篇 |
外科学 | 5406篇 |
综合类 | 222篇 |
一般理论 | 15篇 |
预防医学 | 3372篇 |
眼科学 | 1130篇 |
药学 | 2322篇 |
中国医学 | 184篇 |
肿瘤学 | 1948篇 |
出版年
2024年 | 28篇 |
2023年 | 279篇 |
2022年 | 184篇 |
2021年 | 968篇 |
2020年 | 448篇 |
2019年 | 1098篇 |
2018年 | 1817篇 |
2017年 | 1047篇 |
2016年 | 863篇 |
2015年 | 734篇 |
2014年 | 860篇 |
2013年 | 1584篇 |
2012年 | 2901篇 |
2011年 | 3290篇 |
2010年 | 1529篇 |
2009年 | 850篇 |
2008年 | 2560篇 |
2007年 | 2626篇 |
2006年 | 2379篇 |
2005年 | 2453篇 |
2004年 | 2280篇 |
2003年 | 2210篇 |
2002年 | 1998篇 |
2001年 | 1407篇 |
2000年 | 1834篇 |
1999年 | 935篇 |
1998年 | 217篇 |
1997年 | 129篇 |
1996年 | 129篇 |
1995年 | 106篇 |
1994年 | 83篇 |
1993年 | 82篇 |
1992年 | 111篇 |
1991年 | 97篇 |
1990年 | 79篇 |
1989年 | 77篇 |
1988年 | 72篇 |
1987年 | 53篇 |
1986年 | 31篇 |
1985年 | 55篇 |
1984年 | 58篇 |
1983年 | 50篇 |
1982年 | 40篇 |
1981年 | 30篇 |
1980年 | 33篇 |
1978年 | 33篇 |
1977年 | 22篇 |
1976年 | 21篇 |
1975年 | 21篇 |
1973年 | 24篇 |
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
71.
M I Arranz Pe?a E Saenz Lope 《Zeitschrift für klinische Chemie und klinische Biochemie》1988,26(11):791-793
A nitrogen-specific gas-chromatographic method is described for the quantitative analysis of soluphylline without the need for derivatization or evaporation of solvent, and using only 50 microliters of serum. The analysis is performed isothermally on a silicone stationary phase, 2% SP 2250 DA (Supelco). After a single neutral extraction with ethyl acetate containing the internal standard (beta-hydroxypropyl theophylline), an aliquot of the organic solvent is injected directly into the gas chromatograph. The detector sensitivity (least measurable amount) for soluphylline was 1 ng. 相似文献
72.
F. J. Barbado J. J. Vázquez J. M. Pe?a F. Arnalich J. Ortiz-Vázquez 《Postgraduate medical journal》1992,68(805):884-887
Comparison was made of the aetiology and methods of diagnosis in two series of patients meeting the classic criteria of pyrexia of unknown origin during 1968-1981 and during 1982-1989 seen in the Department of Internal Medicine at La Paz University Hospital, Madrid, Spain. There was a statistically significant decrease in the percentage of infections and an increase in neoplasms and connective tissue disorders in the second series. The percentage of patients diagnosed by laparatomy was similar in both series but the diagnosis yield at laparotomy was greater in the second period. Pyrexia of unknown origin continues to be a condition which can defy clinical expertise in in spite of advances in diagnostic techniques. 相似文献
73.
J. Sanchez Burson J. Graña Gil M. Rosales Rodriguez A. Atanes Sandoval C. Alonso Blanco F. Galdo Fernandez 《Clinical rheumatology》1992,11(2):261-264
Summary We have studied the characteristics of arthritis present in 32 patients with Behçet's disease (BD), and how this arthritis is related to the HLA markers class I. 84% of the patients presented arthritis, the most common being monoarthritis as the initial presentation, and oligoarthritis in subsequent episodes. In 63% of the cases, the development was in episodes of acute/subacute arthritis. We found statistically significant association between antigens B-5 and B-51, and the group with BD, with a relative risk of 3.89 and 4.71 respectively. The attempt to relate markers B-5, B-51 and B-27 to the presence of arthritis as well as to its manifestation and further development was not conclusive. 相似文献
74.
J L Martínez Sande A Amaro Cendón E Blanco Labrador M Pérez Rodríguez A Sánchez Prieto C Iglesias Carre?o M Gil de la Pe?a 《Revista espa?ola de cardiología》1992,45(8):545-548
A 32-year old woman, with endocarditis caused by Streptococcus mitis, and systolic murmur is presented. The Doppler examination was found a systolic gradient of 150 mmHg. Aortography showed a multiple membranous supravalvular aortic stenosis, with aneurysmal dilatation of the left main coronary artery and circumflex artery, associated with bicuspid aortic valve and mild aortic insufficiency. The patient died suddenly by cardiac arrest in stand by to cardiac surgery. Anatomic comprobation was not possible. The coronary artery anomalies associated with the supravalvular aortic stenosis syndrome are reviewed. 相似文献
75.
Delvys Rodríguez-Abreu Marta Llanos Muñoz Mariano Provencio Pulla Antonio Rueda Domínguez Dolores Isla Casado 《Clinical & translational oncology》2010,12(11):760-764
Follicular lymphoma (FL) is the second most common subtype of non-Hodgkin’s lymphoma (NHL) in the Western world. FL constitutes the most frequent indolent lymphoma, well characterized by its clinical presentation related to nodal involvement and its morphologic and biologic features. It is often managed as an incurable disease. However, several active therapeutic approaches from the ‘wait and watch” strategy to the allogeneic transplantation are available for management of patients with FL and clearly have changed the natural history of this disease, achieving a long-term disease-free survival. Therapeutic decision is mostly conditioned by patient’s characteristics, stage, histological grade, tumor burden, and risk-predicting factors. This article try to summarizes the diagnosis and treatment of this heterogeneous group of patients. 相似文献
76.
Alfredo Avellaneda Fernández álvaro Pérez Martín Maravillas Izquierdo Martínez Mar Arruti Bustillo Francisco Javier Barbado Hernández Javier de la Cruz Labrado Rafael Díaz-Delgado Pe?as Eduardo Gutiérrez Rivas Cecilia Palacín Delgado José Ramón Ramón Giménez Javier Rivera Redondo 《Atencion primaria / Sociedad Espa?ola de Medicina de Familia y Comunitaria》2009,41(10):e1-e5
77.
Homid Fahandezh-Saddi Díaz Antonio Ríos-Luna Eduardo García-Rey Ma Jesus Rodea Butragueño Manuel Villanueva-Martinez Ma Elena Cantero-Yubero Miguel del Cerro-Gutiérrez 《European journal of orthopaedic surgery & traumatology : orthopedie traumatologie》2007,17(1):105-109
Treatment of chronic osteomyelitis of distal tibia is complex. It often requires the association of antibiotic therapy and a surgical procedure. This consists of exhaustive debridement of infected bone and soft tissue which must have adequate cutaneous coverage and vascular supply which enables creating a barrier to microorganisms and greater resistance to infection. Free or pedicled muscular flaps have been the techniques most often used for this type of lesions. Free flaps require a precise microsurgical technique and prolonged surgery. Pedicled muscular flaps do not provide sufficient coverage and vascularisation of the distal tibia for large size defects. The fasciocutaneous flap has been used for the treatment of coverage defects in the perimalleolar area and the heel. We report the utility of this flap as management of chronic osteomyelitis of the distal third of the tibia with complete healing of the infection and correct cutaneous coverage without complications. 相似文献
78.
79.
Juan Francisco Sánchez Muñoz-Torrero Paloma Barquilla Raul Velasco Maria del Carmen Fernández Capitan Nazaret Pacheco Lucia Vicente Jose Luis Chicón Sara Trejo Jose Zamorano Alicia Lorenzo Hernandez 《European journal of clinical pharmacology》2010,66(12):1257-1264
Objectives
This study was designed to assess the prevalence of adverse drug reactions (ADRs) in the internal medicine wards of two teaching Hospitals, identify the most common ADRs, the principal medications involved, and determine the risk factors implicated in the occurrence of such ADRs. 相似文献80.