关于美国CDC推文对佩戴口/面罩建议的言语行为研究

A Research on the Speech Act of Suggestion of Centers for Disease Control and Prevention on Wearing Masks

摘要: 以美国疾病控制与预防中心（CDC）官方推特账号2020年上半年发布的口/面罩相关推文为语料，分析该机构关于佩戴口/面罩的建议言语行为。研究显示，这些建议言语行为不断发生变化，演变历程可分为五个阶段。这些变化与美国新冠疫情发展状况、口罩生产、对口罩的文化偏见等因素有关。

Abstract: Based on the tweets about masks published by CDC official twitter account in the first half of 2020, this paper analyzes the speech act of suggestion about wearing masks. The research shows that the speech acts of suggestion are constantly changing, and the evolution process can be divided into five stages. These changes are related to the development of COVID-19 in the United States, mask production, and the cultural bias of masks.