全文获取类型
收费全文 | 13643篇 |
免费 | 1808篇 |
国内免费 | 240篇 |
专业分类
耳鼻咽喉 | 939篇 |
儿科学 | 245篇 |
妇产科学 | 62篇 |
基础医学 | 1009篇 |
口腔科学 | 652篇 |
临床医学 | 1481篇 |
内科学 | 326篇 |
皮肤病学 | 64篇 |
神经病学 | 643篇 |
特种医学 | 803篇 |
外国民族医学 | 1篇 |
外科学 | 4383篇 |
综合类 | 1720篇 |
预防医学 | 427篇 |
眼科学 | 308篇 |
药学 | 529篇 |
11篇 | |
中国医学 | 423篇 |
肿瘤学 | 1665篇 |
出版年
2024年 | 12篇 |
2023年 | 251篇 |
2022年 | 313篇 |
2021年 | 513篇 |
2020年 | 719篇 |
2019年 | 665篇 |
2018年 | 533篇 |
2017年 | 582篇 |
2016年 | 655篇 |
2015年 | 613篇 |
2014年 | 918篇 |
2013年 | 1047篇 |
2012年 | 792篇 |
2011年 | 821篇 |
2010年 | 714篇 |
2009年 | 720篇 |
2008年 | 648篇 |
2007年 | 619篇 |
2006年 | 562篇 |
2005年 | 549篇 |
2004年 | 447篇 |
2003年 | 404篇 |
2002年 | 333篇 |
2001年 | 349篇 |
2000年 | 306篇 |
1999年 | 189篇 |
1998年 | 192篇 |
1997年 | 138篇 |
1996年 | 123篇 |
1995年 | 112篇 |
1994年 | 83篇 |
1993年 | 91篇 |
1992年 | 80篇 |
1991年 | 63篇 |
1990年 | 45篇 |
1989年 | 71篇 |
1988年 | 44篇 |
1987年 | 41篇 |
1986年 | 36篇 |
1985年 | 55篇 |
1984年 | 43篇 |
1983年 | 24篇 |
1982年 | 42篇 |
1981年 | 31篇 |
1980年 | 30篇 |
1979年 | 20篇 |
1978年 | 15篇 |
1977年 | 16篇 |
1976年 | 9篇 |
1975年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 21 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
《Journal of cranio-maxillo-facial surgery》2022,50(3):225-229
The aim of this study was to investigate the clinical course of masticatory function recovery following arthrocentesis. Patients with a unilateral condylar head fracture who underwent arthrocentesis for therapeutic reasons were evaluated and compared with patients with a unilateral condylar head fracture who did not undergo arthrocentesis. At 3 months after treatment, the occlusal contact area and maximum bite force in patients with a fracture treated with arthrocentesis were greater than in those who did not receive arthrocentesis at the same time points, although the differences were not significant. Moreover, at 1 and 3 months following arthrocentesis, mean (±SD) occlusal contact area (1 month: 1.99 ± 0.55 mm2, p = 0.01; 3 months: 2.90 ± 1.36 mm2, p = 0.03) and maximum bite force (1 month: 82.45 ± 15.04 N, p = 0.01; 3 months: 101.11 ± 14.53 N, p = 0.01) on the fractured side in patients who underwent that treatment were significantly reduced when compared with those on the non-fractured side. The authors conclude that if the priority is to avoid open reduction and internal fixation, then the arthrocentesis approach might be a less invasive alternative, albeit with the price of a prolonged healing interval. 相似文献
9.
10.
《Clinical oncology (Royal College of Radiologists (Great Britain))》2021,33(10):e433-e441
AimsCareful management of a patient's nutritional status during and after treatment for head and neck squamous cell cancers (HNSCC) is crucial for optimal outcomes. The aim of this study was to develop a model for stratifying a patient's risk of requiring reactive enteral feeding through a nasogastric tube during radiotherapy for HNSCC, based on clinical and treatment-related factors.Materials and methodsA cohort of consecutive patients treated with definitive (chemo)radiotherapy for HNSCC between January 2016 and January 2018 was identified in the institutional electronic database for retrospective analysis. Patients requiring enteral feeding pretreatment were excluded. Clinical and treatment data were obtained from prospectively recorded electronic clinical notes and planning software.ResultsBaseline patient characteristics and tumour-related parameters were captured for 225 patients. Based on the results of the univariate analysis and using a stepwise backwards selection process, clinical and dosimetric variables were selected to optimise a clinically predictive multivariate model, fitted using logistic regression. The parameters found to affect the probability, P, of requiring a nasogastric feeding tube for >4 weeks in our clinical multivariate model were: tumour site, tumour stage (early T0/1/2 stage versus advanced T3/T4 stage), chemotherapy drug (none versus any drug) and mean dose to the contralateral parotid gland. A scoring model using the regression coefficients of the selected variables in the clinical multivariate model achieved an area under the curve (AUC) of 0.745 (95% confidence interval 0.678–0.812), indicating good discriminative performance. Internal validation of the model involved splitting the dataset 80:20 into training and test datasets 10 times and assessing differences in AUC of the model fitted to these.ConclusionsWe developed an easy-to-use prediction model based on both clinical and dosimetric parameters, which, once externally validated, can lead to more personalised treatment planning and inform clinical decision-making on the appropriateness of prophylactic versus reactive enteral feeding. 相似文献