全文获取类型
收费全文 | 177742篇 |
免费 | 1160篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 1167篇 |
儿科学 | 6647篇 |
妇产科学 | 3080篇 |
基础医学 | 16769篇 |
口腔科学 | 1589篇 |
临床医学 | 12560篇 |
内科学 | 31135篇 |
皮肤病学 | 814篇 |
神经病学 | 16930篇 |
特种医学 | 9131篇 |
外科学 | 29114篇 |
综合类 | 2331篇 |
一般理论 | 3篇 |
预防医学 | 18109篇 |
眼科学 | 2892篇 |
药学 | 9561篇 |
中国医学 | 626篇 |
肿瘤学 | 16466篇 |
出版年
2023年 | 27篇 |
2022年 | 62篇 |
2021年 | 101篇 |
2020年 | 74篇 |
2019年 | 86篇 |
2018年 | 21992篇 |
2017年 | 17417篇 |
2016年 | 19586篇 |
2015年 | 964篇 |
2014年 | 882篇 |
2013年 | 881篇 |
2012年 | 7108篇 |
2011年 | 21141篇 |
2010年 | 18898篇 |
2009年 | 11609篇 |
2008年 | 19621篇 |
2007年 | 21809篇 |
2006年 | 694篇 |
2005年 | 2293篇 |
2004年 | 3480篇 |
2003年 | 4455篇 |
2002年 | 2593篇 |
2001年 | 314篇 |
2000年 | 444篇 |
1999年 | 228篇 |
1998年 | 238篇 |
1997年 | 245篇 |
1996年 | 114篇 |
1995年 | 110篇 |
1994年 | 112篇 |
1993年 | 71篇 |
1992年 | 56篇 |
1991年 | 105篇 |
1990年 | 140篇 |
1989年 | 89篇 |
1988年 | 71篇 |
1987年 | 54篇 |
1986年 | 44篇 |
1985年 | 52篇 |
1984年 | 35篇 |
1983年 | 29篇 |
1982年 | 31篇 |
1980年 | 43篇 |
1974年 | 27篇 |
1938年 | 60篇 |
1937年 | 26篇 |
1935年 | 24篇 |
1934年 | 30篇 |
1932年 | 56篇 |
1930年 | 47篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
Paul Hochstein Ulrich Glatzel Thomas Schmickal Andreas Wentzensen 《Trauma und Berufskrankheit》2002,4(2):s110-s114
The treatment of deep cartilage defects in load-bearing joints is a problem that still has no satisfactory solution. Full-thickness defects of the articular cartilage rarely heal spontaneously, usually leaving damage that can lead to early arthrosis. Techniques currently available for the treatment of chondral defects include abrasion, drilling, micro-fracturing, transplantation of tissue autografts and allografts, and cell transplantation. Osteochondral autograft transplantation is currently the only surgical cartilage repair technique known to lead to the formation of genuine hyaline articular cartilage and its retention at least in the medium term. The Draenert method, in which a water-cooled diamond bone-cutting system is used, is an effective procedure for resurfacing the joints affected by localised cartilaginous defects, even when there is also severe bone loss. Donor-side morbidity can be kept to a minimum by filling the defect caused by harvesting with a press-fit cylinder of cancellous bone covered with periosteum for protection. 相似文献
14.
J. Bryan Page 《Journal of urban health》2005,82(3):iii35-iii43
Contemporary discourse contains numerous examples of use of the concept of culture by social and behavioral scientists. Simple reification, where the speaker makes culture into a thing capable of action exemplifies one usage in public discourse. Some quantitative social scientists attempt to characterize people’s cultural identities by means of a single categorical variable, which often “lumps” people into categories such as “Hispanic” or “Black” that in fact have numerous culturally bounded subcategories. Approaches that emphasize cultural process are preferable to those who attempt to categorize; more complex measures of acculturation help investigators to make convincing analyses of circumstances in which health disparities occur. Examples in which investigators make appropriate use of cultural characterizations demonstrate their utility in investigating health disparities in Haitian American women, injecting and noninjecting drug users, Hispanic youth, and adult Hispanics at risk of HIV infection. Focus on culture in the study of health disparities can identify entanglements between structural factors such as poverty and lack of education and cultural factors such as beliefs about health. Qualitative methods coupled with quantitative methods have great potential to improve investigators’ grasp of cultural nuance while capturing the distribution of qualitatively derived behaviors. 相似文献
15.
16.
OBJECTIVE: Cancer Care Ontario has recommended a population-based colorectal cancer (CRC) screening program using fecal occult blood testing. Patients who test positive should undergo further investigation, preferably colonoscopy. So far, no studies have been performed to quantify the costs or demands on the health care system at the community level. The number of consultations, colonoscopies and polypectomies, and the corresponding direct medical costs generated by the CRC screening program, between 2006 and 2015 in London, Ontario, were estimated using a decision analysis model in comparison with the population health model. METHODS: A faxed survey study was conducted to examine the current CRC screening practice among family physicians in London. Data from the survey and randomized studies were applied to a decision analysis model, which simulated the steps involved in population-based biennial and annual CRC screening between 2006 and 2015. The number of consultations, colonoscopies and polypectomies, and their associated costs were calculated. RESULTS: For a cohort population of 140,000, between 50 and 74 years of age, in 2006 to 2015, it is estimated that an average of 412 consultations, 463 colonoscopies and 174 polypectomies will be performed per 100,000 screen eligible population per year in biennial screening, and double in annual screening, reflecting an average of 8.7% or 17.6% increase annually in outpatient colonoscopies, respectively, compared with 2003. A mean of $285,000 or $562,000 per year would be required to support the extra consultation and endoscopic procedures generated by the biennial or annual screening. CONCLUSION: Population-based fecal occult blood testing screening for CRC appears to be a manageable strategy if a modest increase in endoscopic resources is allocated. 相似文献
17.
18.
Pilar Nicolás 《Hereditary cancer in clinical practice》2007,5(3):144-152
The specific characteristics of genetic data lead to ethical-legal conflicts in the framework of genetic diagnosis. Several international organisations, including UNESCO and the Council of Europe, have enacted rules referring to the use of genetic information. This paper discusses possible legal and ethical criteria that could be used in genetic testing. 相似文献
19.
20.
Sergio Barroilhet Adrián Cano-Prous Salvador Cervera-Enguix Maria João Forjaz Francisco Guillén-Grima 《Social psychiatry and psychiatric epidemiology》2009,44(12):1051-1065