全文获取类型
收费全文 | 19344篇 |
免费 | 874篇 |
国内免费 | 627篇 |
专业分类
耳鼻咽喉 | 100篇 |
儿科学 | 281篇 |
妇产科学 | 89篇 |
基础医学 | 904篇 |
口腔科学 | 470篇 |
临床医学 | 3006篇 |
内科学 | 662篇 |
皮肤病学 | 140篇 |
神经病学 | 516篇 |
特种医学 | 2320篇 |
外国民族医学 | 1篇 |
外科学 | 6682篇 |
综合类 | 2392篇 |
现状与发展 | 1篇 |
预防医学 | 1714篇 |
眼科学 | 293篇 |
药学 | 754篇 |
4篇 | |
中国医学 | 357篇 |
肿瘤学 | 159篇 |
出版年
2024年 | 29篇 |
2023年 | 276篇 |
2022年 | 541篇 |
2021年 | 638篇 |
2020年 | 586篇 |
2019年 | 536篇 |
2018年 | 545篇 |
2017年 | 469篇 |
2016年 | 471篇 |
2015年 | 499篇 |
2014年 | 1124篇 |
2013年 | 1561篇 |
2012年 | 1036篇 |
2011年 | 1295篇 |
2010年 | 1110篇 |
2009年 | 1129篇 |
2008年 | 1085篇 |
2007年 | 1136篇 |
2006年 | 935篇 |
2005年 | 854篇 |
2004年 | 706篇 |
2003年 | 715篇 |
2002年 | 550篇 |
2001年 | 571篇 |
2000年 | 446篇 |
1999年 | 335篇 |
1998年 | 275篇 |
1997年 | 167篇 |
1996年 | 134篇 |
1995年 | 147篇 |
1994年 | 114篇 |
1993年 | 85篇 |
1992年 | 88篇 |
1991年 | 69篇 |
1990年 | 63篇 |
1989年 | 58篇 |
1988年 | 52篇 |
1987年 | 48篇 |
1986年 | 39篇 |
1985年 | 58篇 |
1984年 | 56篇 |
1983年 | 22篇 |
1982年 | 37篇 |
1981年 | 38篇 |
1980年 | 29篇 |
1979年 | 26篇 |
1978年 | 17篇 |
1977年 | 16篇 |
1976年 | 13篇 |
1975年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Sports Imaging has dramatically increased in the past decade with increasing number of adolescents, young and middle-aged adults participating in non-competitive/hobby sports. Therefore, sports injuries are no longer confined to elite athletes. Furthermore, newer forms of sports such as mountain climbing, pickle ball and curling etc. are gaining popularity. Majority of the injuries in sports medicine are from musculoskeletal trauma. Therefore, it is imperative that the musculoskeletal radiologist becomes familiar with various sports related injury patterns as these are commonly encountered in daily practice. This update aims to briefly encapsulate the major aspects of sports imaging. It includes the imaging manifestations of various types of musculoskeletal injuries on different modalities (commonly US and MRI) and briefly mentions the various image guided interventions, performed both on the sports field and in the hospital setting. 相似文献
2.
3.
4.
The study aimed to assess the effect of exogenous factors such as surgeon posture, surgical instrument length, fatigue after a night shift, exercise and caffeine consumption on the spatial accuracy of neurosurgical manipulations. For the evaluation and simulation of neurosurgical manipulations, a testing device developed by the authors was used. The experimental results were compared using nonparametric analysis (Wilcoxon test) and multivariate analysis, which was performed using mixed models. The results were considered statistically significant at p < 0.05. The study included 11 first-year neurosurgery residents who met the inclusion criteria. Hand support in the sitting position (Wilcoxon test p value = 0.0033), caffeine consumption (p = 0.0058) and the length of the microsurgical instrument (p = 0.0032) had statistically significant influences on the spatial accuracy of surgical manipulations (univariate analysis). The spatial accuracy did not significantly depend on the type of standing position (Wilcoxon test p value = 0.2860), whether the surgeon was standing/sitting (p = 0.1029), fatigue following a night shift (p = 0.3281), or physical exertion prior to surgery (p = 0.2845).When conducting the multivariate analysis, the spatial accuracy significantly depended on the test subject (p < 0.0001), the use of support during the test (p = 0.0001), and the length of the microsurgical instrument (p = 0.0397). To increase the spatial accuracy of microsurgical manipulations, hand support and shorter tools should be used. Caffeine consumption in high doses should also be avoided prior to surgery. 相似文献
5.
6.
Clint R. Bellenger John B. Arnold Jonathan D. Buckley Dominic Thewlis Joel T. Fuller 《Journal of Science and Medicine in Sport》2019,22(3):294-299
Objectives
To investigate whether functional overreaching affects locomotor system behaviour when running at fixed relative intensities and if any effects were associated with changes in running performance.Design
Prospective intervention study.Methods
Ten trained male runners completed three training blocks in a fixed order. Training consisted of one week of light training (baseline), two weeks of heavy training designed to induce functional overreaching, and ten days of light taper training designed to allow athletes to recover from, and adapt to, the heavy training. Locomotor behaviour, 5-km time trial performance, and subjective reports of training status (Daily Analysis of Life Demands for Athletes (DALDA) questionnaire) were assessed at the completion of each training block. Locomotor behaviour was assessed using detrended fluctuation analysis of stride intervals during running at speeds corresponding to 65% and 85% of maximum heart rate (HRmax) at baseline.Results
Time trial performance (effect size ±95% confidence interval (ES): 0.16 ± 0.06; p < 0.001), locomotor behaviour at 65% HRmax (ES: ?1.12 ± 0.95; p = 0.026), and DALDA (ES: 2.55 ± 0.80; p < 0.001) were all detrimentally affected by the heavy training. Time trial performance improved relative to baseline after the taper (ES: ?0.16 ± 0.10; p = 0.003) but locomotor behaviour at 65% HRmax (ES: ?1.18 ± 1.17; p = 0.048) and DALDA (ES: 0.92 ± 0.90; p = 0.045) remained impaired.Conclusions
Locomotor behaviour during running at 65% HRmax was impaired by functional overreaching and remained impaired after a 10-day taper, despite improved running performance. Locomotor changes may increase injury risk and should be considered within athlete monitoring programs independently of performance changes. 相似文献7.
8.
High-pressure injection injuries (HPII) caused by water swelling sealant are rare at present. The patient generally has small-sized skin lesions, and the misleadingly benign presentation may cause delayed treatment at the early stage of management. In addition, radiographic examination may be underestimated. Subsequently, the inadequate surgical intervention may cause tissue necrosis and poor prognosis. Furthermore, the early recognition of water swelling sealant injected into tissue and emergent surgical intervention are the key to successful management for the patient with HPII caused by injecting water swelling sealant to tissue. 相似文献
9.
《JACC: Cardiovascular Interventions》2022,15(12):1205-1215
BackgroundDistal radial access (DRA) has been proposed to improve procedure ergonomics and favor radial artery patency. Although promising data, nothing is known on evolving hand function after DRA.ObjectivesThis study sought to comprehensively evaluate hand function in patients undergoing DRA.MethodsReal-world patients undergoing DRA undertook a thorough multimodality assessment of hand function implementing multidomain questionnaires (Disabilities of the Arm, Shoulder and Hand and Levine-Katz), and motor (pinch grip test) and sensory (Semmes-Weinstein monofilaments test) examinations of both hands. All assessments were performed at preprocedural baseline and planned at 1-, 6-, and 12-month follow-up (FU). Adverse clinical and procedural events were documented too.ResultsData of 313 patients (220 men, age 66 ± 10 years) from 9 international centers were analyzed. The Disabilities of the Arm, Shoulder and Hand and the Levine-Katz scores slightly improved from baseline to FU (P = 0.008 and P = 0.029, respectively). Pinch strength mildly improved from baseline to FU (P < 0.001 for both the left and right hands). Similarly, touch pressure threshold appeared to faintly improve in both the left and right hands (P < 0.012 for all the sites). For both motor and sensory function tests, comparable findings were found for the DRA hand and the contralateral one, with no significant differences between them. Repeated assessment of all tests over all FU time points similarly showed lack of worsening hand function. Access-related adverse events included 19 harmless bleedings and 3 forearm radial artery and 3 distal radial artery occlusions. None affected hand function at FU.ConclusionsIn a systematic multidimensional assessment, DRA was not associated with hand function impairment. Moreover, DRA emerges as a safe alternative vascular access. 相似文献
10.
目的对比分析单纯关节镜手术与关节镜手术联合Ilizarov外固定架关节牵张术治疗踝关节创伤性关节炎的临床疗效。 方法纳入2016年10月至2018年4月聊城市中医医院收治的早中期踝关节创伤性关节炎患者30例,排除非创伤性关节炎和终末期踝关节炎。其中接受单纯踝关节镜手术者纳入对照组(n=15),接受关节镜手术联合Ilizarov外固定架关节牵张成形术者纳入研究组(n=15),术后随访6个月,对比分析两组患者的治疗效果:疼痛视觉模拟评分(VAS)、踝关节功能评分(Kofoed评分)以及生活质量的变化。计数资料比较采用卡方或Fisher精确检验,计量资料比较采用独立样本t检验。 结果研究组治疗有效率大于对照组(χ2=7.214,P<0.05),术后疼痛视觉模拟评分明显低于对照组(t =10.342,P<0.05),Kofoed评分高于对照组(t =10.452,P<0.05);研究组生活质量显著高于对照组(P<0.05)。 结论关节镜手术联合关节牵张成形术对早中期踝关节创伤性关节炎较单纯关节镜手术短期效果更好,可成为临床治疗中的一种选择,但远期效果尚需进一步研究。 相似文献