全文获取类型
收费全文 | 29215篇 |
免费 | 2504篇 |
国内免费 | 323篇 |
专业分类
耳鼻咽喉 | 388篇 |
儿科学 | 446篇 |
妇产科学 | 522篇 |
基础医学 | 1259篇 |
口腔科学 | 306篇 |
临床医学 | 4953篇 |
内科学 | 2770篇 |
皮肤病学 | 392篇 |
神经病学 | 1284篇 |
特种医学 | 694篇 |
外科学 | 2537篇 |
综合类 | 4168篇 |
一般理论 | 1篇 |
预防医学 | 5408篇 |
眼科学 | 151篇 |
药学 | 3647篇 |
21篇 | |
中国医学 | 1379篇 |
肿瘤学 | 1716篇 |
出版年
2024年 | 73篇 |
2023年 | 598篇 |
2022年 | 1269篇 |
2021年 | 1503篇 |
2020年 | 1554篇 |
2019年 | 1383篇 |
2018年 | 1281篇 |
2017年 | 1162篇 |
2016年 | 1106篇 |
2015年 | 1072篇 |
2014年 | 2753篇 |
2013年 | 2288篇 |
2012年 | 2114篇 |
2011年 | 2186篇 |
2010年 | 1587篇 |
2009年 | 1598篇 |
2008年 | 1515篇 |
2007年 | 1420篇 |
2006年 | 1132篇 |
2005年 | 899篇 |
2004年 | 690篇 |
2003年 | 517篇 |
2002年 | 386篇 |
2001年 | 318篇 |
2000年 | 298篇 |
1999年 | 264篇 |
1998年 | 174篇 |
1997年 | 172篇 |
1996年 | 139篇 |
1995年 | 132篇 |
1994年 | 94篇 |
1993年 | 91篇 |
1992年 | 63篇 |
1991年 | 54篇 |
1990年 | 35篇 |
1989年 | 22篇 |
1988年 | 23篇 |
1987年 | 14篇 |
1986年 | 6篇 |
1985年 | 18篇 |
1984年 | 12篇 |
1983年 | 5篇 |
1982年 | 7篇 |
1981年 | 7篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1972年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane (Kryptofix® 2.2.2) is used in the routine preparation of [18F]-labeled tracers employed in positron emission tomography (PET) imaging. Confirming the absence of Kryptofix® in radiopharmaceuticals is a quality control criterion required before they can be released for human use. Analysis of Kryptofix® levels using the iodoplatinate spot-test can be complicated by false-positive results due to nitrogen containing tracers and/or false-negative results caused by added stabilizers. To overcome this issue, we have developed a universal TLC method for the rapid and reliable determination of Kryptofix® levels in the wide range of fluorine-18 radiopharmaceuticals we prepare, including complex multi-component formulations. 相似文献
52.
<正>This is a review of current situation of induced abortion and post abortion family planning service in China. Induced abortion is an important issue in reproductive health. This article reviewed the distribution of induced abortion in various time, areas, and population in China, and explored the character, reason, and harm to reproductive health of induced abortion. Furthermore, this article introduces the concept of Quality of Care Program in Family Planning, and discusses how important and necessary it is to introduce Quality of Care Program in Family Planning to China. 相似文献
53.
当医学素质教育中广博、个性、创新等观念日益被教育者和教育对象接受的同时,常常又容易陷入另一个误区,即盲目接纳、肯定这些观念,高没有对其进行审慎、辩证的思考,文章通过素质教育中几对观念的辨析,以期对此形成客观、全面的认识。 相似文献
54.
均一吸收体中SPECT重建多解性的探讨 总被引:1,自引:0,他引:1
通过对重建图像噪声特性的分析,间接证明SPECT的解具有多样性。分别用TretiakMetz、Gulberg、富谷武浩等推导的3种等价重建方法和Belini等推导的重建方法,经计算机模拟重建衰减均匀分布的图像,先预置相同的重建图像的空间分辨率,再比较它们的噪声特性。两种方法重建图像的噪声分布:前者近图像边缘时增大,而后者减小,从而间接证明在假定均匀衰减条件下,SPECT的重建有多解性。 相似文献
55.
P. Lips MD C. Cooper D. Agnusdei F. Caulin P. Egger O. Johnell J. A. Kanis U. Liberman H. Minne J. Reeve J. Y. Reginster M. C. de Vernejoul I. Wiklund 《Osteoporosis international》1997,7(1):36-38
The morbidity of osteoporosis is caused by fractures. Vertebral fractures lead to pain and disability and a decrease in quality of life. A Working Party of the European Foundation for Osteoporosis has developed a specific questionnaire for patients with established vertebral osteoporosis. This questionnaire is intended for use in clinical trials. The questionnaire consists of questions and visual analogue scales in the following domains: pain, activities of daily living, jobs around the house, mobility, leisure and social activities, general health perception and mood. The questionnaire has been translated from English into French, German, Italian, Hebrew, Swedish and Dutch. The questionnaire is currently being validated in a multicentre study involving patients with stable osteoporosis and control subjects. Preliminary results indicate that the reproducibility is sufficient and that the questionnaire is able to discriminate between patients with vertebral osteoporosis and control subjects. 相似文献
56.
Late Effects of Childhood Acute Leukemia and Its Treatment 总被引:1,自引:0,他引:1
Masao Yamamoto M.D. Yoshitaka Fukunaga M.D. Ichiroh Tsukimoto M.D. Fumio Bessho M.D. Jun-ichi Akatsuka M.D. Ryohta Hosoya M.D. Shinpei Nakazawa M.D. Minoru Sakurai M.D. Kazuhiro Ueda M.D. Sumio Miyazaki M.D. Masaru Yokoyama M.D. Hideo Mugishima M.D. Kohzoh Nishimura M.D. 《Pediatrics international》1991,33(4):573-588
Late effects of childhood acute leukemia and its treatment were studied in 766 patients (684 ALL, 73 ANLL, and 9 others) in Japan who had remained in remission for more than 1 year after their first complete remission. Delayed adverse sequelae involve a wide variety of organs and their functions. Short stature was present in 2.61%, obesity in 3.79%, abnormalities of growth hormone secretion in 1.5%, delayed secondary sex characteristics in 1.5% of males and 0.6% of females, motor disturbances in 1.17%, sensory disturbances in 0.91%, intellectual and learning disabilities in 2.48%, abnormal findings in routine neurologic examinations in 1.31%, EEG abnormalities in 4.30%, brain CT abnormalities in 5.09% and cardiac dysfunction in 1.07%. Various other disorders were seen in 20 patients. Many of these delayed adverse sequelae are caused by or related to central nervous system prophylaxis and systemic combination chemotherapy. The results suggest that it is needed to improve therapeutic methods through the stratification of patients by risk factors and detailed analysis of prognostic factors. Moreover it is important to render medical and psychosocial support to long-term survivors of childhood leukemia through interactions between the patient, parents and medical staff. 相似文献
57.
论医院质量管理推行ISO9000族标准的必要性 总被引:10,自引:1,他引:9
为了迎接医疗市场的竞争和挑战 ,医院将应用于工业企业的ISO90 0 0族标准引入到医疗服务领域。它通过严格的过程控制 ,使医院实现了质量管理制度健全化、系统化、合理化 ,大大减少了服务中的差错 ,全面提高了服务质量 ;通过工作程序化及持续改进 ,改善了医务人员的工作环境 ,提高了医院运作效率和运营效益。本文从现行的质量管理的不足分析入手 ,从八个方面阐述医院质量管理推行IS0 90 0 0族标准的必要性 ,以此来说明医院的质量管理采用ISO90 0 0族标准 ,将会使医院的质量管理有一个质的飞跃。事实证明通过认证的医院已从中收益。 相似文献
58.
External quality assessment (EQA) schemes in histopathology form a key part of laboratory quality management, but their principal function is educational. ‘Test’ material is circulated to participants, who evaluate the material following their normal practice and return responses to an organizing laboratory for collation and evaluation. The test material must be representative of the routine workload, but not mundane. Unlike histopathology slide clubs, objective, quantitative, personal feedback for each participant is vital to ensure unambiguously the identification of areas requiring CPD. The objective evaluation of textual responses in EQA is problematic, but various approaches have been used successfully. The participants are individuals, not laboratories, so confidentiality is paramount. Mechanisms to investigate persistent substandard performance must exist, but should be used very rarely; self-improvement is the usual route to protecting standards of patient care. 相似文献
59.
品质圈活动是确保质量得到持续改进和控制的有效方法之一.对品质圈活动的概念、内涵、实施以及在护理工作中的实践应用做一综述,旨在帮助护理工作人员认识实施品质圈活动的意义,为护理管理者全面提高护理质量提供一些借鉴和启示. 相似文献