全文获取类型
收费全文 | 3895篇 |
免费 | 487篇 |
国内免费 | 50篇 |
专业分类
耳鼻咽喉 | 42篇 |
儿科学 | 88篇 |
妇产科学 | 83篇 |
基础医学 | 652篇 |
口腔科学 | 135篇 |
临床医学 | 314篇 |
内科学 | 863篇 |
皮肤病学 | 37篇 |
神经病学 | 493篇 |
特种医学 | 252篇 |
外科学 | 299篇 |
综合类 | 57篇 |
一般理论 | 1篇 |
预防医学 | 390篇 |
眼科学 | 266篇 |
药学 | 268篇 |
1篇 | |
肿瘤学 | 191篇 |
出版年
2021年 | 40篇 |
2020年 | 25篇 |
2019年 | 32篇 |
2018年 | 56篇 |
2017年 | 38篇 |
2016年 | 47篇 |
2015年 | 60篇 |
2014年 | 78篇 |
2013年 | 112篇 |
2012年 | 138篇 |
2011年 | 158篇 |
2010年 | 100篇 |
2009年 | 88篇 |
2008年 | 139篇 |
2007年 | 173篇 |
2006年 | 170篇 |
2005年 | 161篇 |
2004年 | 147篇 |
2003年 | 171篇 |
2002年 | 117篇 |
2001年 | 127篇 |
2000年 | 111篇 |
1999年 | 99篇 |
1998年 | 99篇 |
1997年 | 81篇 |
1996年 | 101篇 |
1995年 | 76篇 |
1994年 | 69篇 |
1993年 | 54篇 |
1992年 | 100篇 |
1991年 | 84篇 |
1990年 | 98篇 |
1989年 | 101篇 |
1988年 | 114篇 |
1987年 | 119篇 |
1986年 | 89篇 |
1985年 | 93篇 |
1984年 | 65篇 |
1983年 | 61篇 |
1982年 | 46篇 |
1981年 | 51篇 |
1980年 | 43篇 |
1979年 | 55篇 |
1978年 | 47篇 |
1977年 | 48篇 |
1976年 | 30篇 |
1975年 | 34篇 |
1974年 | 27篇 |
1972年 | 34篇 |
1970年 | 30篇 |
排序方式: 共有4432条查询结果,搜索用时 31 毫秒
1.
2.
3.
G E Davies A V Thompson Z Niewola G E Burrows E L Teasdale D J Bird D A Phillips 《Occupational and environmental medicine》1983,40(4):442-449
Twenty four volunteers who had been allergic to laboratory animals for some years were examined by means of a questionnaire paying particular attention to symptoms associated with rats and by serological and skin tests with extracts of rat urine (retrospective study). Nasal and eye symptoms were reported by 21 and 16 individuals respectively: 13 had asthma. Positive skin tests and high levels of specific IgE antibody to rat urine extract were found in 17 of the more severely affected individuals and this group included 12 of those with asthma. Latent periods of work with animals before symptoms appeared varied from 0.5 to 12 years. Also 148 individuals were studied during their first year of work with animals (prospective study). Symptoms developing during the year were reported by 15%, asthma by 2%. IgE antibody levels to rat urine were raised in 40% of affected and 6% of the unaffected individuals but there was no significant correlation between symptoms and either antibody levels or positive skin tests. Allergic symptoms developing during the first year of postemployment were, on the whole, much milder than those seen in the retrospective study. A tentative conclusion is that most individuals who become allergic to laboratory animals develop the condition in a mild form during their first year of employment but it appears probable that atopic individuals, although having an equal chance of developing allergy as compared with non-atopic individuals, may eventually progress to a more severe form of the disease. 相似文献
4.
5.
Carel Bron Michel Wensing Jo LM Franssen Rob AB Oostendorp 《BMC musculoskeletal disorders》2007,8(1):107
Background
Shoulder disorders are a common health problem in western societies. Several treatment protocols have been developed for the clinical management of persons with shoulder pain. However available evidence does not support any protocol as being superior over others. Systematic reviews provide some evidence that certain physical therapy interventions (i.e. supervised exercises and mobilisation) are effective in particular shoulder disorders (i.e. rotator cuff disorders, mixed shoulder disorders and adhesive capsulitis), but there is an ongoing need for high quality trials of physical therapy interventions. Usually, physical therapy consists of active exercises intended to strengthen the shoulder muscles as stabilizers of the glenohumeral joint or perform mobilisations to improve restricted mobility of the glenohumeral or adjacent joints (shoulder girdle). It is generally accepted that a-traumatic shoulder problems are the result of impingement of the subacromial structures, such as the bursa or rotator cuff tendons. Myofascial trigger points (MTrPs) in shoulder muscles may also lead to a complex of symptoms that are often seen in patients diagnosed with subacromial impingement or rotator cuff tendinopathy. Little is known about the treatment of MTrPs in patients with shoulder disorders. 相似文献6.
Detection of the carrier state of X-linked retinoschisis 总被引:8,自引:0,他引:8
G B Arden M B Gorin P J Polkinghorne M Jay A C Bird 《American journal of ophthalmology》1988,105(6):590-595
We determined the extent of suppressive rod-cone interaction in 11 obligate carriers and eight potential carriers of X-linked retinoschisis from eight families. Despite otherwise normal ophthalmoscopic and functional testing, all of the obligate heterozygous carriers demonstrated a complete absence of normal rod-cone interaction. Of the potential heterozygous carriers, three had normal rod-cone interactions, two had no detectable interaction, and two yielded technically unsatisfactory results. This lack of rod-cone interactions allows heterozygous individuals to be identified clinically and has implications concerning the origin of this inherited disorder. 相似文献
7.
8.
9.
Demonstration of human papillomavirus types 6 and 11 in juvenile laryngeal papillomatosis by in-situ DNA hybridization 总被引:3,自引:0,他引:3
A study is reported in which an in situ hybridization technique for the demonstration of human papillomavirus (HPV) employing a biotin--streptavidin polyalkaline phosphatase complex has been successfully applied to formalin-fixed paraffin-processed tissue obtained from ten patients with juvenile laryngeal papillomatosis. In all cases, positive results were obtained for either HPV type 6 or 11. Normal vocal cord epithelium was negative. 相似文献
10.