全文获取类型
收费全文 | 1990篇 |
免费 | 120篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 11篇 |
儿科学 | 57篇 |
妇产科学 | 56篇 |
基础医学 | 247篇 |
口腔科学 | 109篇 |
临床医学 | 175篇 |
内科学 | 495篇 |
皮肤病学 | 19篇 |
神经病学 | 205篇 |
特种医学 | 43篇 |
外科学 | 243篇 |
综合类 | 19篇 |
一般理论 | 3篇 |
预防医学 | 152篇 |
眼科学 | 56篇 |
药学 | 102篇 |
中国医学 | 19篇 |
肿瘤学 | 111篇 |
出版年
2023年 | 12篇 |
2022年 | 40篇 |
2021年 | 81篇 |
2020年 | 48篇 |
2019年 | 53篇 |
2018年 | 66篇 |
2017年 | 40篇 |
2016年 | 58篇 |
2015年 | 44篇 |
2014年 | 66篇 |
2013年 | 104篇 |
2012年 | 147篇 |
2011年 | 137篇 |
2010年 | 84篇 |
2009年 | 80篇 |
2008年 | 143篇 |
2007年 | 114篇 |
2006年 | 102篇 |
2005年 | 108篇 |
2004年 | 74篇 |
2003年 | 85篇 |
2002年 | 69篇 |
2001年 | 34篇 |
2000年 | 39篇 |
1999年 | 30篇 |
1998年 | 16篇 |
1997年 | 22篇 |
1996年 | 12篇 |
1995年 | 12篇 |
1994年 | 15篇 |
1993年 | 7篇 |
1992年 | 25篇 |
1991年 | 23篇 |
1990年 | 14篇 |
1989年 | 9篇 |
1988年 | 13篇 |
1987年 | 10篇 |
1986年 | 14篇 |
1985年 | 10篇 |
1984年 | 8篇 |
1983年 | 7篇 |
1982年 | 9篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 4篇 |
1975年 | 4篇 |
1974年 | 3篇 |
1973年 | 3篇 |
1970年 | 3篇 |
1969年 | 4篇 |
排序方式: 共有2122条查询结果,搜索用时 0 毫秒
51.
Micrographia (MG), an acquired impairment of writing characterized by diminution of letter size, coupled with slowing and loss of accuracy, is most frequently observed in the course of degenerative disease of basal ganglia, such as Parkinson’s Disease. Only a few cases of MG without concomitant extrapyramidal signs have been described, mostly following vascular lesion of the left basal ganglia. In this article we report an isolated pattern of MG following an extensive traumatic cerebral lesion centered in the left basal ganglia. The nature of this impairment is analyzed according to a cognitive model of writing and interpreted as a specific example of peripheral dysgraphia. 相似文献
52.
Teresa Cristina Barros Schütz Thays Crosara Abrah?o Cunha Thais Moura-Guimaraes Gabriela Pontes Luz Carolina Ackel-D'Elia Eduardo da Silva Alves Gilberto Pantiga Junior Marco Tulio de Mello Sergio Tufik Lia Bittencourt 《Clinics (S?o Paulo, Brazil)》2013,68(8):1168-1174
OBJECTIVE:
There are several treatments for obstructive sleep apnea syndrome, such as weight loss, use of an oral appliance and continuous positive airway pressure, that can be used to reduce the signs and symptoms of obstructive sleep apnea syndrome. Few studies have evaluated the effectiveness of a physical training program compared with other treatments. The aim of this study was to assess the effects of physical exercise on subjective and objective sleep parameters, quality of life and mood in obstructive sleep apnea patients and to compare these effects with the effects of continuous positive airway pressure and oral appliance treatments.METHODS:
Male patients with moderate to severe obstructive sleep apnea and body mass indices less than 30 kg/m2 were randomly assigned to three groups: continuous positive airway pressure (n = 9), oral appliance (n = 9) and physical exercise (n = 7). Polysomnographic recordings, blood samples and daytime sleepiness measurements were obtained prior to and after two months of physical exercise or treatment with continuous positive airway pressure or an oral appliance. Clinicaltrials.gov: NCT01289392RESULTS:
After treatment with continuous positive airway pressure or an oral appliance, the patients presented with a significant reduction in the apnea-hypopnea index. We did not observe changes in the sleep parameters studied in the physical exercise group. However, this group presented reductions in the following parameters: T leukocytes, very-low-density lipoprotein and triglycerides. Two months of exercise training also had a positive impact on subjective daytime sleepiness.CONCLUSIONS:
Our results suggest that isolated physical exercise training was able to modify only subjective daytime sleepiness and some blood measures. Continuous positive airway pressure and oral appliances modified the apnea-hypopnea index. 相似文献53.
54.
55.
56.
Roberto Michelucci Elena Pasini Sandro Malacrida Pasquale Striano Carlo Di Bonaventura Patrizia Pulitano Francesca Bisulli Gabriella Egeo Lia Santulli Vito Sofia Antonio Gambardella Maurizio Elia Arturo de Falco Angela la Neve Paola Banfi Giangennaro Coppola Patrizia Avoni Simona Binelli Clementina Boniver Tiziana Pisano Marco Marchini Emanuela Dazzo Manuela Fanciulli Yerma Bartolini Patrizia Riguzzi Lilia Volpi Fabrizio A. de Falco Anna Teresa Giallonardo Oriano Mecarelli Salvatore Striano Paolo Tinuper Carlo Nobile 《Epilepsia》2013,54(7):1288-1297
57.
Niki Antypa Ina Giegling Raffaella Calati Barbara Schneider Annette M. Hartmann Marion Friedl Bettina Konte Loredana Lia Diana De Ronchi Alessandro Serretti Dan Rujescu 《European archives of psychiatry and clinical neuroscience》2013,263(5):393-403
MAOA and, to a lesser extent, MAOB polymorphisms have been related to aggression traits and suicidality. We aimed to investigate the role of MAOA and MAOB in suicidal versus non-suicidal participants and interactions between genetic variation and suicidal status on aggression and anger-related traits. The sample was composed of three groups: one group of suicide attempters (n = 171, males 35.1 %), one group of suicide completers (n = 90, males 57.8 %) and a healthy control group (n = 317, males 43.8 %). We examined the following markers: MAOA rs909525, rs6323, and rs2064070, and MAOB rs1799836. Anger traits were measured with the state-trait anger expression inventory (STAXI) and aggression traits with the questionnaire for measuring factors of aggression (FAF). Associations were separately examined for males and females. Variation in the three MAOA variants was associated with higher levels of anger expressed outwards (STAXI “anger-out” subscale) in male suicidal patients compared to controls (p < 0.001). In females, the C allele of rs6323 showed higher scores on the same subscale (“anger out”) (p = 0.002). Allele frequencies of the MAOA rs909525 were associated with suicidality (p < 0.007). Our findings show an association between genetic variation in three polymorphisms of the MAOA and anger traits in suicidal males and one replication for the functional variant rs6323 in females. This relationship was stronger than a direct genetic association with suicide status. Future studies incorporating endophenotypic measures of anger and aggression in suicidal participants are warranted. 相似文献
58.
Kastrop PM de Graaf-Miltenburg LA Gutknecht DR Weima SM 《Human reproduction (Oxford, England)》2007,22(8):2243-2248
BACKGROUND: Although rare, microbial contamination of culture dishes occasionally occurs in our IVF/ICSI programme. Despite stringent culture conditions and the use of medium containing penicillin and streptomycin, an increasing number of infections was observed once they were routinely recorded. In this study, 95 cases of contaminated culture dishes were examined, in an attempt to identify possible causes. METHODS: Relevant data of the IVF/ICSI treatment cycles and the micro-organisms isolated from the infected culture dishes were evaluated retrospectively. RESULTS: Infections were observed only in IVF culture dishes and never after applying intra-cytoplasmic sperm injection. Identification of the contaminating micro-organisms showed that infections were mainly caused by Escherichia coli (n = 56; 58.9%) and Candida species (n = 24; 25.3%). Of the E. coli strains isolated, 41 (73.2%) appeared to be resistant to both antibiotics used in the culture medium and 13 (23.2%) appeared to resist either penicillin or streptomycin. Of all bacterial strains isolated, the resistances were 61.4% to both and 30% to one of the antibiotics used. CONCLUSIONS: Applying the ICSI procedure prevents colonization of the culture dishes by micro-organisms. Infections in IVF culture dishes are mainly caused by bacterial strains insensitive to the antibiotics used or due to yeast colonization by Candida species which frequently reside in the vagina. 相似文献
59.
60.
BACKGROUND: Absence of medical documents damages the quality of treatment and service. Despite the computerized medical folder, its use is still limited, and not all countries have a national health communications systems. That is why the patients are asked to bring with them the documents they hold. However, some patients lose the documents and others are uncooperative due to forgetfulness, and a lack of knowledge. OBJECTIVES: To examine how patients perceive, keep and manage medical documents. DESIGN: The research was conducted in the qualitative method. SETTINGS: A cardiology clinic, in a big medical center in Israel. PARTICIPANTS: A total of 28 patients suffering from ischemic heart disease and/or rhythm disorders. The sample was a convenience one, and were taken from the population visiting the Cardiology Clinic from May to October 2003. METHODS: Semi-structured interviews were held with the participants. The data were processed by means of content analysis. RESULTS: The findings indicate that, even though the participants expressed that it is the health system's responsibility to manage medical documents, most of them kept, and some even managed, their medical documents via a personal folder. By keeping documents and deciding to whom and when to show them the patient functions as a self-care manager. This made them more involved in their treatment and, they felt in control and empowered. CONCLUSION: Patient's attention to documents, as keeper and router, results in demonstrations of responsibility and involvement in treatment, consequently empowering the patient. 相似文献