@RidleyDM @DrLeanaWen There are plenty of situations where there is just NO enforcement at all, like inside malls and such. People still wear the mask a lot more when there is a mandate (often with large behavior change within a day or two) then when there isn't.
@RidleyDM@DrLeanaWen在很多情况下根本没有强制执行，比如在购物中心等。当有任务时（通常在一两天内行为发生巨大变化），人们戴口罩的次数仍然比没有任务时多得多。