全文获取类型
收费全文 | 33752篇 |
免费 | 3042篇 |
国内免费 | 80篇 |
专业分类
耳鼻咽喉 | 259篇 |
儿科学 | 1143篇 |
妇产科学 | 1012篇 |
基础医学 | 4665篇 |
口腔科学 | 723篇 |
临床医学 | 4698篇 |
内科学 | 5827篇 |
皮肤病学 | 490篇 |
神经病学 | 3682篇 |
特种医学 | 713篇 |
外国民族医学 | 3篇 |
外科学 | 3559篇 |
综合类 | 572篇 |
一般理论 | 55篇 |
预防医学 | 4053篇 |
眼科学 | 598篇 |
药学 | 2492篇 |
中国医学 | 38篇 |
肿瘤学 | 2292篇 |
出版年
2023年 | 261篇 |
2022年 | 313篇 |
2021年 | 604篇 |
2020年 | 439篇 |
2019年 | 681篇 |
2018年 | 767篇 |
2017年 | 614篇 |
2016年 | 626篇 |
2015年 | 709篇 |
2014年 | 1018篇 |
2013年 | 1477篇 |
2012年 | 2088篇 |
2011年 | 2172篇 |
2010年 | 1184篇 |
2009年 | 1162篇 |
2008年 | 1840篇 |
2007年 | 2054篇 |
2006年 | 2020篇 |
2005年 | 1882篇 |
2004年 | 1846篇 |
2003年 | 1693篇 |
2002年 | 1658篇 |
2001年 | 646篇 |
2000年 | 617篇 |
1999年 | 578篇 |
1998年 | 378篇 |
1997年 | 320篇 |
1996年 | 289篇 |
1995年 | 284篇 |
1994年 | 252篇 |
1993年 | 250篇 |
1992年 | 378篇 |
1991年 | 372篇 |
1990年 | 351篇 |
1989年 | 317篇 |
1988年 | 313篇 |
1987年 | 295篇 |
1986年 | 297篇 |
1985年 | 303篇 |
1984年 | 240篇 |
1983年 | 225篇 |
1982年 | 165篇 |
1981年 | 180篇 |
1980年 | 166篇 |
1979年 | 221篇 |
1978年 | 153篇 |
1977年 | 151篇 |
1976年 | 149篇 |
1974年 | 147篇 |
1973年 | 152篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
Depressed patients were interviewed at two different severity levels in the course of their illness about both problematic and neutral topics, and their speech behavior was analyzed in terms of speech activity and silences. Lowered speech activity and increased silences occurred at higher severity levels and also during problematic communication content, suggesting the mediation of cognitive factors as postulated by Beck's cognitive model of depression. 相似文献
72.
The prevalence of nausea and emesis among a series of out-patients (n = 95) receiving mainly mild-to moderately-emetic cytotoxics, was assessed, along with levels of psychological morbidity. Particular focus was given to the rates of psychologically-based (anticipatory) nausea and emesis. Results indicated that 23% of patients experienced anticipatory nausea and the majority reported that this occurred before at least half of the previous treatment cycles. Both emetic challenge of chemotherapy regimen and younger age were linked to this anticipatory effect. The data clearly indicated that nausea and emesis, both post-treatment and in anticipation of treatment, carried a psychological cost with anxiety being highest in those experiencing anticipatory nausea and/or emesis. The role of anxiety in the aetiology of psychologically-based nausea and emesis was not evaluated and it is considered that a prospective study is needed to clarify the exact contribution of psychological factors in the incidence of both post-treatment and anticipatory side-effects. 相似文献
73.
74.
Helen McConachie 《Child: care, health and development》2006,32(6):752-752
Joint attention and symbolic play in young children with autism: a randomized controlled intervention study . Kasari C. , Freeman S. & Paparella T. ( 2006 ) Journal of Child Psychology and Psychiatry (formerly Journal of Child Psychology and Psychiatry and Allied Disciplines) , 47 , 611 – 620 . 相似文献
75.
76.
Penelope Hopwood Mandy Barnett Ann Cull Lesley Fallowfield Maggie Watson Susie Wilkinson 《Psycho-oncology》1992,1(2):119-122
The 8th Conference of the British Psychosocial Oncology Group was held in London on 9–10 December 1991 and attracted over 120 participants. The conference was extended from its usual one day format to one and a half days, to allow more time for both a formal and informal exchange of ideas. Eight invited speakers participated, but proferred papers and posters remained an important focus of the meeting. This is the largest annual conference in Britain for professionals working in psychosocial oncology and an important forum for the presentation of research. As in previous years, the conference attracted a number of newcomers, indicating the continued expansion of this field of research. A number of topical issues were presented in keynote papers by invited speakers. New work in cancer prevention and the associated areas of counselling families at risk and ethical issues, formed one symposium. Communication skills and relevant training needs in paediatric and adult oncology were an important theme of the conference and intervention studies formed the third main topic. 相似文献
77.
A case of emphysematous cholecystitis with gall-bladder perforation, resulting in free intraperitoneal gas, is presented. It adds to only nine previous reports. A successful outcome was achieved by early surgery, combined with appropriate antibiotic therapy. 相似文献
78.
We report on a case of keratoconus in identical twins who were brought up in Christchurch, New Zealand. Videokeratoscopy using an EyeSysa (EyeSys Laboratories, Houston, Texas, USA) revealed not only marked differences in severity of keratoconus between the sisters, but also non-equivalent cone types. Both twin sisters reported an exacerbation of their keratoconus during pregnancy and during breast feeding. Various factors affecting the development and progression of keratoconus are discussed. (Clin Exp Optom 1995; 78: 4: 125–129) 相似文献
79.
80.
Summary Prosthetic materials, such as metals, marlex mesh and methyl methacrylate have been used for stabilization of the chest wall after resection of large areas of rib cage. Such materials are contraindicated in an infected area. A new method of providing a stable chest wall using autogenous tissue is presented. 相似文献