No statistically significant differences in amount of blood loss, duration of surgery, total complication rate, nor clinical results were found among the four treatment methods.
结果：术中出血量、手术时间、总的并发症发生率及临床结果在四种治疗方法中没有统计学差异。
Conclusion small incision total joint replacement surgery a small amount of blood loss, less trauma to patients, treatment with the traditional no significant difference between the standard incision.
结论应用小切口全关节置换术术中出血量小，对患者创伤较小，治疗效果与传统标准切口手术无明显差异。
Aiming at stop loss reinsurance, this paper derives optimal pricing model of reinsurance on the basis of total claim amount using mean-variance premium principle and utility theory.
停止损失再保险作为一种再保险方式，在具有相同保费的前提下，能使保险人的期望效用最大，并能使其自留风险方差最小。
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