在大流行期间而有没有人做到24X7戴口罩，这种比较就是个伪随机。得或没得，戴口罩降低的传染会被无处不在的病毒抵消。

来源: dakinglaile 于 2023-02-14 08:45:43 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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