紧闭门窗门窗紧闭后，室内24小时的二氧化碳含量就会增加，这时会使人出现头晕、乏力、胸闷、烦燥等现象。而常开门窗是解决室内空气污染最有效最简单的方法。因此，冬季不应紧闭门窗。蒙头睡觉被窝里空气混浊，氧气稀少，蒙头大睡，会胸闷、恶心、突然惊醒、出虚汗。还有的老 Closed doors and windows tightly closed doors and windows, the indoor 24-hour carbon dioxide levels will increase, then people will cause dizziness, fatigue, chest tightness, irritability and so on. And often open windows and doors is the most effective and easiest way to solve indoor air pollution. Therefore, windows and doors should not be closed in winter. Mengtou sleeping blanket turbid air, sparsely oxygen, head Meng sleep, chest tightness, nausea, suddenly awakened, out of sweat. There are old