全文获取类型
收费全文 | 8258篇 |
免费 | 715篇 |
国内免费 | 28篇 |
专业分类
耳鼻咽喉 | 170篇 |
儿科学 | 373篇 |
妇产科学 | 218篇 |
基础医学 | 939篇 |
口腔科学 | 228篇 |
临床医学 | 664篇 |
内科学 | 2146篇 |
皮肤病学 | 259篇 |
神经病学 | 567篇 |
特种医学 | 259篇 |
外科学 | 1460篇 |
综合类 | 28篇 |
一般理论 | 2篇 |
预防医学 | 714篇 |
眼科学 | 193篇 |
药学 | 395篇 |
中国医学 | 34篇 |
肿瘤学 | 352篇 |
出版年
2023年 | 35篇 |
2022年 | 78篇 |
2021年 | 224篇 |
2020年 | 124篇 |
2019年 | 284篇 |
2018年 | 276篇 |
2017年 | 201篇 |
2016年 | 211篇 |
2015年 | 215篇 |
2014年 | 299篇 |
2013年 | 380篇 |
2012年 | 431篇 |
2011年 | 512篇 |
2010年 | 349篇 |
2009年 | 259篇 |
2008年 | 397篇 |
2007年 | 459篇 |
2006年 | 459篇 |
2005年 | 424篇 |
2004年 | 384篇 |
2003年 | 371篇 |
2002年 | 358篇 |
2001年 | 304篇 |
2000年 | 358篇 |
1999年 | 254篇 |
1998年 | 67篇 |
1997年 | 55篇 |
1996年 | 56篇 |
1995年 | 50篇 |
1994年 | 39篇 |
1993年 | 38篇 |
1992年 | 135篇 |
1991年 | 115篇 |
1990年 | 102篇 |
1989年 | 98篇 |
1988年 | 55篇 |
1987年 | 54篇 |
1986年 | 48篇 |
1985年 | 51篇 |
1984年 | 34篇 |
1983年 | 30篇 |
1979年 | 27篇 |
1975年 | 20篇 |
1974年 | 18篇 |
1973年 | 24篇 |
1972年 | 22篇 |
1971年 | 21篇 |
1970年 | 18篇 |
1969年 | 22篇 |
1968年 | 19篇 |
排序方式: 共有9001条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
Kristina W. Whitworth Brenda Berumen-Flucker George L. Delclos Sonia Fragoso Claudia Mata David Gimeno Ruiz de Porras 《Archives of environmental & occupational health》2020,75(2):70-74
AbstractThe occupational hazards and respiratory symptoms of domestic cleaners in USA are largely unknown. We conducted a cross-sectional study among 56 Hispanic female domestic cleaner on their health status and frequency of cleaning products used and tasks performed. While women used multi-use products (60.0%) and toilet bowl cleaners (51.8%) most days of the week, many (39.3%) reported not using personal protective equipment while cleaning. Itchy/watery eyes (61.8%) and itchy nose (56.4%) were the most frequently reported symptoms. A history of physician-diagnosed asthma was reported by 14.3% while 33.9% had symptoms of bronchial hyperresponsiveness (BHR). In conclusion, this vulnerable population has high prevalence of physician-diagnosis asthma and BHR symptoms and is potentially exposed to myriad occupational hazards. Further research exploring associations between products use, cleaning tasks and respiratory symptoms is warranted. 相似文献
6.
S. Nishida J. J. Gaynor N. Nakamura F. Butt H. G. Illanes J. Kadono G. W. Neff D. M. Levi J. I. Moon G. Selvaggi T. Kato P. Ruiz A. G. Tzakis J. R. Madariaga 《American journal of transplantation》2006,6(1):140-149
A retrospective study of 1058 liver transplant recipients was performed to determine: (i) the incidence, etiology, timing, clinical features and treatment of refractory ascites (RA), (ii) risk factors for RA development, (iii) predictors of RA disappearance, (iv) predictors of survival following RA and (v) the impact of RA on patient survival. Sixty-two patients (5.9%) developed RA and its disappearance occurred in 27/62 cases. Patients having hepatitis C virus (HCV) had a significantly higher hazard rate of developing RA (p < 0.00001). No other baseline characteristic was associated with RA. Cox stepwise regression analysis of the hazard rate of RA disappearance found two significant factors: HCV recurrence as the reason for developing RA implied a poorer outcome (p = 0.006), whereas an unknown reason implied a favorable outcome (p = 0.02). In addition, survival following RA was significantly poorer among patients having bacterial peritonitis or HCV recurrence. Finally, the mortality rate was significantly (nearly 8.6 times) higher in patients following RA development while it was ongoing (p < 0.00001); however, if the RA disappeared, then the additional risk of death also disappeared. This study illustrates the importance of developing an optimal treatment strategy to (i) effectively treat RA if it develops and (ii) prevent hepatitis C recurrence. 相似文献
7.
J I?igo A Arce E Rodríguez D García de Viedma E Palenque M J Ruiz Serrano L Cabello F Chaves 《The international journal of tuberculosis and lung disease》2006,10(5):550-553
SETTING: Tuberculosis (TB) cases reported from nine districts of Madrid, where the percentage of immigrant population varied from 1.9% in 1996 to 12.2% in 2003. OBJECTIVE: To describe the trends in TB incidence from 1994 to 2003. DESIGN: Observational study. RESULTS: Between 1994-1995 and 2002-2003, the TB rate decreased from 48.5 (95% CI 45.8-51.1) to 23.3 per 100000 population (95% CI 21.5-25.1) (P < 0.001). The percentage of TB cases co-infected with HIV decreased from 55.9% in 1994 to 14.3% in 2003 (P < 0.001), whereas TB cases in foreigners increased from 2.6% in 1994 to 33.7% in 2003 (P < 0.001). CONCLUSION: Although the TB rates showed a marked decrease in the study period, the increasing impact of immigration contributed to slowing down the trend. 相似文献
8.
T López-Alburquerque A García Miguel J J Ruiz Ezquerro J de Portugal Alvarez 《Journal of neurology, neurosurgery, and psychiatry》1987,50(4):428-434
The nerve action potential at the elbow and somatosensory evoked potentials (SEPs) at the scalp were recorded over 30 minutes of tourniquet-induced limb ischaemia in 10 diabetic patients and 10 controls. According to the SEP changes, an increased resistance to nerve ischaemia in diabetic patients was observed. The pathways involved in SEP conduction are discussed. 相似文献
9.
Angela Bryan Reuben N Robbins Monica S Ruiz Dennis O'Neill 《Health education & behavior》2006,33(2):154-177
Prisons and prison inmates present important targets for HIV/AIDS prevention interventions. Inmates often have histories of high-risk behavior that place them in danger of contracting HIV/AIDS, and rates of HIV/AIDS tend to be much higher in this population. The goal of this study was to assess the effectiveness of a prison-based HIV/AIDS intervention to change attitudes toward HIV prevention, norms supporting HIV prevention, perceived behavioral control (i.e., self-efficacy) for HIV prevention behaviors, and intentions to engage in HIV prevention behaviors postrelease. The intervention also had the goal of encouraging inmates to become HIV/AIDS peer educators. The intervention appeared most successful at influencing beliefs and behaviors related to peer education and somewhat successful at influencing beliefs and intentions related to condom use. Analyses also showed some significant differences in effectiveness by race/ethnicity. Results are discussed from the perspectives of both research and practice with regard to prison-based HIV prevention efforts. 相似文献
10.
Aneurisma de aorta abdominal infrarrenal en asociación con riñón en herradura: aportación de un caso
Nerea Senarriaga Ruiz de la Illa Reyes Vega Manrique Isabel Lacasa Viscasillas Iñaki Iriarte Soldevilla Miguel Unda Urzaiz 《Actas urologicas espa?olas》2009,33(10):1141-1144
We review the association between surgically resolvable aortic disease and horseshoe kidney with a discussion of diagnostic problems and therapeutic options.Male patient 81 years of age with horseshoe kidney and an abdominal aortic aneurysm that was discovered by chance in an abdominal ultrasound during a check-up for his prostate condition.A retroperitoneal approach was used in order to resect the aneurysm and perform an aorto-aortic bypass with no complications occurring. Two years after the diagnosis, the patient is still asymptomatic from a vascular point of view.The co-presence of horseshoe kidney and aortic disease needing surgical correction is infrequent, but it significantly increases the technical complexity of aortic reconstruction. A literature review is included. 相似文献