每到寒冷的冬季,许多家庭为了阻止冷空气进入室内,总是门窗紧闭。这样,虽然起到了一定的保暖作用,但室内空气容易变得混浊,氧气稀薄,很不利于人体健康。 卫生谚语云:“门窗常开,清风常来,健康常在”。这话颇有道理。 Every winter, many families keep the doors and windows closed to prevent cold air from entering the room. In this way, although played a certain role in warmth, but the indoor air tends to become cloudy, oxygen thin, it is not conducive to human health. Health proverb goes: “Doors and windows often open, breeze often come, health often.” This makes sense.