全文获取类型
收费全文 | 1373439篇 |
免费 | 99315篇 |
国内免费 | 2158篇 |
专业分类
耳鼻咽喉 | 19075篇 |
儿科学 | 45012篇 |
妇产科学 | 39786篇 |
基础医学 | 202058篇 |
口腔科学 | 38040篇 |
临床医学 | 116447篇 |
内科学 | 270634篇 |
皮肤病学 | 28060篇 |
神经病学 | 108611篇 |
特种医学 | 53767篇 |
外国民族医学 | 375篇 |
外科学 | 209649篇 |
综合类 | 27009篇 |
现状与发展 | 2篇 |
一般理论 | 410篇 |
预防医学 | 104034篇 |
眼科学 | 30601篇 |
药学 | 103544篇 |
1篇 | |
中国医学 | 2702篇 |
肿瘤学 | 75095篇 |
出版年
2018年 | 13822篇 |
2016年 | 11945篇 |
2015年 | 13703篇 |
2014年 | 18850篇 |
2013年 | 28153篇 |
2012年 | 39266篇 |
2011年 | 41794篇 |
2010年 | 24442篇 |
2009年 | 23186篇 |
2008年 | 40077篇 |
2007年 | 43187篇 |
2006年 | 43566篇 |
2005年 | 42514篇 |
2004年 | 40476篇 |
2003年 | 39176篇 |
2002年 | 38422篇 |
2001年 | 61183篇 |
2000年 | 62661篇 |
1999年 | 53385篇 |
1998年 | 15459篇 |
1997年 | 13791篇 |
1996年 | 14085篇 |
1995年 | 13232篇 |
1994年 | 12546篇 |
1993年 | 11577篇 |
1992年 | 42910篇 |
1991年 | 42058篇 |
1990年 | 41526篇 |
1989年 | 40213篇 |
1988年 | 37539篇 |
1987年 | 36613篇 |
1986年 | 34916篇 |
1985年 | 33255篇 |
1984年 | 24788篇 |
1983年 | 21545篇 |
1982年 | 12791篇 |
1981年 | 11303篇 |
1979年 | 23330篇 |
1978年 | 16307篇 |
1977年 | 14056篇 |
1976年 | 13234篇 |
1975年 | 14498篇 |
1974年 | 17046篇 |
1973年 | 16402篇 |
1972年 | 15616篇 |
1971年 | 14522篇 |
1970年 | 13444篇 |
1969年 | 12945篇 |
1968年 | 12238篇 |
1967年 | 10654篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
N. V. Bashmakova G. N. Chistiakova I. A. Gazieva Y. M. Trapeznikova D. O. Mazurov 《Gynecological endocrinology》2015,31(10):31-33
AbstractThis study was undertaken to compare the concentrations of pro- and anti-angiogenic growth factors, nitric oxide (NO) stable metabolites in maternal serum and embryonic left ventricular (LV) isovolumic relaxation time (IRT, ms) during the first trimester in two groups of women: with pregnancy conceived by assisted reproductive technologies (ART, n?=?39) and normally conceived (control group, n?=?68) pregnancy. The concentration of vasoconstrictor endothelin 1 was 45.5 times more in ART than in control group. On the contrary, the concentrations of NO stable metabolites in ART were 1.9 times less than in control women. The assessment of angiogenic suppressors in ART women demonstrates the decrease in s-endoglin concentration was 1.6 times and in soluble receptor to vascular endothelial growth factor concentration was 2.0 times in comparison with control group. There was a significant increase in LV IRT in ART embryos in comparison to control ones. These data suggest significant changes in pro- anti-angiogenic factors balance and increase in vascular impedance in ART-conceived embryos. 相似文献
102.
103.
104.
105.
Arjenne H.M. Gussenhoven Amika S. Singh S. Theo Goverts Marten van Til Johannes R. Anema Sophia E. Kramer 《International journal of audiology》2015,54(8):507-517
Objective: A multidisciplinary vocational rehabilitation programme, the Vocational Enablement Protocol (VEP) was developed to address the specific needs of employees with hearing difficulties. In the current study we evaluated the process of implementing the VEP in audiologic care among employees with hearing impairment. Design: In conjunction with a randomized controlled trial, we collected and analysed data on seven process parameters: recruitment, reach, fidelity, dose delivered, dose received and implemented, satisfaction, and perceived benefit. Study sample: Sixty-six employees with hearing impairment participated in the VEP. The multidisciplinary team providing the VEP comprised six professionals. Results: The professionals performed the VEP according to the protocol. Of the recommendations delivered by the professionals, 31% were perceived as implemented by the employees. Compliance rate was highest for hearing-aid uptake (51%). Both employees and professionals were highly satisfied with the VEP. Participants rated good perceived benefit from it. Conclusions: Our results indicate that the VEP could be a useful treatment for employees with hearing difficulties from a process evaluation perspective. Implementation research in the audiological setting should be encouraged in order to further provide insight into parameters facilitating or hindering successful implementation of an intervention and to improve its quality and efficacy. 相似文献
106.
Irmak Karaca Suzan Güven Yılmaz Melis Palamar Halil Ateş 《Ocular immunology and inflammation》2020,28(6):947-951
ABSTRACT
Purpose
To investigate the effect of 1% tropicamide on anterior chamber aqueous flare (ACAF) measurements acquired with laser flare meter in patients with pseudoexfoliation. 相似文献107.
108.
Novel coronavirus, SARS-CoV2, has caused pandemic of highly contagious disease called coronavirus disease 2019 (COVID-19), with epicenters in China, Italy, 相似文献
109.
Bob C. Mulder Merel A. A. van Lelyveld Sigrid C. J. M. Vervoort Anne Marike Lokhorst Cees M. J. van Woerkum Jan M. Prins 《Health communication》2016,31(1):35-46
Since the introduction of cART (combination antiretroviral therapy), HIV has evolved into a chronic disease such that it requires lifelong medical treatment to which patients must adhere. Communication with health care providers is pivotal in supporting patients to adapt to having HIV and adhering to treatment, in order to maintain health and quality of life. Previous research indicates that communication is optimal when it matches patient preferences for information exchange, relationship establishment, and involvement in treatment decisions. The aim of the present study is to explore HIV patient communication preferences as well as patient experiences with their providers (not) matching their preferences. A second aim is to explore provider beliefs about patient preferences and provider views on optimal communication. Data were collected through interviews with 28 patients and 11 providers from two academic hospitals. Results indicate that patient preferences reflect their cognitive, emotional, and practical needs such that patients look to increase their sense of control over their HIV. Patients aim to further increase their sense of control (by proxy) through their relationship with their providers and through their decisional involvement preferences. Providers are well aware of patient communication preferences but do not explicate underlying control needs. Implications for clinical practice are discussed. 相似文献
110.