全文获取类型
收费全文 | 2140篇 |
免费 | 141篇 |
国内免费 | 53篇 |
专业分类
耳鼻咽喉 | 25篇 |
儿科学 | 67篇 |
妇产科学 | 32篇 |
基础医学 | 213篇 |
口腔科学 | 42篇 |
临床医学 | 320篇 |
内科学 | 242篇 |
皮肤病学 | 7篇 |
神经病学 | 384篇 |
特种医学 | 50篇 |
外科学 | 181篇 |
综合类 | 317篇 |
现状与发展 | 1篇 |
预防医学 | 115篇 |
眼科学 | 18篇 |
药学 | 156篇 |
中国医学 | 144篇 |
肿瘤学 | 20篇 |
出版年
2023年 | 33篇 |
2022年 | 63篇 |
2021年 | 83篇 |
2020年 | 87篇 |
2019年 | 58篇 |
2018年 | 70篇 |
2017年 | 52篇 |
2016年 | 67篇 |
2015年 | 50篇 |
2014年 | 110篇 |
2013年 | 112篇 |
2012年 | 94篇 |
2011年 | 111篇 |
2010年 | 92篇 |
2009年 | 104篇 |
2008年 | 112篇 |
2007年 | 101篇 |
2006年 | 98篇 |
2005年 | 86篇 |
2004年 | 57篇 |
2003年 | 62篇 |
2002年 | 56篇 |
2001年 | 49篇 |
2000年 | 43篇 |
1999年 | 33篇 |
1998年 | 49篇 |
1997年 | 42篇 |
1996年 | 31篇 |
1995年 | 30篇 |
1994年 | 35篇 |
1993年 | 23篇 |
1992年 | 28篇 |
1991年 | 27篇 |
1990年 | 17篇 |
1989年 | 17篇 |
1988年 | 15篇 |
1987年 | 16篇 |
1986年 | 10篇 |
1985年 | 15篇 |
1984年 | 10篇 |
1983年 | 14篇 |
1982年 | 7篇 |
1981年 | 9篇 |
1980年 | 10篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 9篇 |
1976年 | 9篇 |
1974年 | 3篇 |
1973年 | 3篇 |
排序方式: 共有2334条查询结果,搜索用时 15 毫秒
1.
2.
《Sleep medicine》2020
BackgroundTo date, no previous studies have evaluated the relationship between sleep duration and quality of life (QOL) or depression in the general population after controlling for daytime sleepiness and sleep disturbances.MethodsA web-based cross-sectional survey was conducted with 8698 subjects aged 20–69 years. We examined the relationships between weekday sleep duration and daytime sleepiness, sleep disturbance, QOL and depression, using the Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index (without the item for sleep duration), 8-item Short Form and Center for Epidemiological Studies Depression Scale (CES-D).ResultsDaytime sleepiness tended to increase in proportion to shorter weekday sleep durations. Sleep disturbances, physical and mental QOL, and CES-D scores were worse in both the shorter and longer sleep groups compared with the group with 7–8 h of sleep. Hierarchical logistic regression analyses revealed that short sleep duration but not long sleep duration was significantly associated with reduction of both physical and mental QOL, even after controlling for the presence of daytime sleepiness and sleep disturbance. Both short and long sleep duration were independently and significantly correlated with depression after controlling for daytime sleepiness; however, there was no statistically significant association after adjusting for the effects of sleep disturbance.ConclusionsThe results suggested adverse effects of short sleep but not long sleep on both physical and mental QOL. In addition, the negative impact of specific types of sleep disturbance on depression may be greater than the impact of shortening of sleep duration. 相似文献
3.
《Sleep medicine》2020
Study objectivesTo analyze the association between sleep-related symptoms and sleep length in parents and their children in relation to other risk factors in both generations.MethodThe participants were parents (n = 5,855, age 54.3 ± 6.5 years, 45.2% men) who participated in the community-based Respiratory Health in Northern Europe (RHINE) study and one random member of their adult offspring (n = 5,855, age 30.2 ± 7.7 years, 41.5% men) who participated in the Respiratory Health in Northern Europe, Spain and Australia (RHINESSA) study. Both generations responded to identical questionnaires on sleep symptoms, including difficulty initiating sleep (DIS), difficulty maintaining sleep (DMS), early morning awakening (EMA), snoring, nocturnal sweating, nocturnal gastroesophageal reflux (nGER), sleep time and excessive daytime sleepiness (EDS). Insomnia was defined as either, or both, DIS and DMS in combination with EDS.ResultsAll sleep variables except nocturnal sweating were more common in offspring whose parents had reported the same symptom. After adjusting for age, gender, BMI, smoking, physical activity, education, center and parents' total number of children, there were independent associations between sleep symptoms in parents and offspring for DIS (adj. OR, 95% CI: 1.52, 1.20–1.93), DMS (1.34, 1.15–1.56), snoring (1.45, 1.15,1.83), nGER (1.65, 1.15–2.37), insomnia (1.39, 1.13–1.73), short sleep time (<6 h/night) (2.51, 1.72–3.68) and EDS (1.48, 1.26,1.72). There were no independent relationships between symptoms in parents and offspring for EMA, nocturnal sweating or long sleep time (>9 h/night).ConclusionThe familiar aggregation of many sleep disturbances was not explained by investigated lifestyle and environmental factors. This supports a heritable factor in sleep problems. 相似文献
4.
将肺心病、慢性肾炎等338例次的血气分析结果输入计算机,应用我们设计的多结果血气判断微机程序判断酸碱紊乱状态,其结果与人工综合判断结果完全相符。而单结果计算机判断和单纯人工判断的结果与人工综合判断结果的符合率分别为88.2%和87.3%。表明多结果计算机判断程序能有效地避免误判、漏判。 相似文献
5.
Background: The occurrence of benign bone cysts adjacent to an active physis may be associated with a physeal arrest. That arrest may result from physeal penetration of the cysts itself, secondary pathologic fracture or the result of surgical curettage. Methods : The pre-treatment X-rays of patients attending the Bone Tumor Clinic at the Children's Hospital and Medical Center were reviewed. Those patients presenting with a bone cyst were identified and the affected side was compared to the normal side in order to determine growth discrepancies. Results: Three cases of benign bone cysts are presented that were located adjacent to a growing physis and produced growth disturbance in the absence of surgical intervention. Conclusions: The risk of growth disturbance in itself should not be a contraindication to surgical intervention. 相似文献
6.
[目的]探索不安障碍治疗的有效途径。[方法]采用中药结合心理干预治疗不安障碍患者40例。[结果]显效31例(77·5%)、有效7例(17·5%)无效2例(5·0%)。SDS、CMI有显著性差异。[结论]中药结合心理干预治疗不安障碍疗效显著。 相似文献
7.
目的 提高对肾移植术后并发大腿感觉功能障碍的认识水平。方法 对179例肾移植术后患者进行问诊和大腿皮肤针刺检查。结果 179例中发现28例存在手术侧大腿感觉功能障碍。其中78例移植肾动脉与髂内动脉吻合的患者中有11例,分别为大腿前面7例、外侧面2例、前面和外侧面2例:101例移植肾动脉与髂外动脉吻合的患者中有17例,分别为大腿前面13例、外侧面1例、前面和外侧面3例。除1例为持续性感觉功能障碍外,其余27例均在术后半年内自愈。结论 肾移植术后出现手术侧大腿皮肤感觉功能障碍是较常见的并发症。肾移植术前应告知患者可能出现这种并发症。 相似文献
8.
目的探讨食管癌贲门癌术后胸胃排空障碍的诱因、诊断和治疗。方法回顾性分析1990年1月-2003年12月我院施行1369例食管癌贲门癌切除术的病人临床资料。结果本组病例发生胸胃排空障碍17例,发生率1.24%,其中机械性胸胃排空障碍5例,功能性胸胃排空障碍12例,均发生于术后3~12d,再次手术治疗5例;治愈16例,死亡1例。结论上消化道造影、胃镜是鉴别机械性胃排空障碍和功能性胃排空障碍的重要方法,对食管癌术后机械性胃排空障碍应采取手术治疗,而功能性胃排空障碍采取保守治疗多能好转。 相似文献
9.
作者通过对1例冲动症案例的分析,结合文献报道,初步阐述了冲动症的概念范围、临床特征与诊断标准。并讨论了其与强迫症、性心理障碍、正常性犯罪之间的区别和责任能力的评定。 相似文献
10.
Psychological Disturbance and its Associations in the Children of the Gujarati Community 总被引:1,自引:1,他引:0
Latha Hackett Richard Hackett David C. Taylor 《Journal of child psychology and psychiatry, and allied disciplines》1991,32(5):851-856
The infrequent referral of Asian children to child psychiatry clinics was noted. By administering Rutter's scale A2 to samples of Gujarati and English parents with children between the ages of 4 and 7 years a lower rate of disturbance was demonstrated among the Asian sample providing an explanation for the original observation. Family and child-rearing factors associated with disturbance were identified. 相似文献