Objective: To evaluate the clinical therapeutic effectiveness of preventing radiation caries by acidulated phosphate fluoride (APFI) gel for patients with nasopharyngeal carcinoma.
目的：对含氟凝胶辅以口腔护理预防鼻咽癌放射龋的临床疗效进行评价。
Through solving a dynamic game, this paper analyzes the characteristics of and regulatory strategies to the opinion-shopping behaviors with variable income (APVI) or fixed income (APFI).
本文通过建立动态博弈模型，分别分析了变动收益和固定收益下的审计意见购买的行为特征及其最优监管策略。
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