用被蒙头睡觉是不好的习惯。人一刻也离不开空气,人在睡眠中虽然呼吸平缓,但也要吸进氧气,呼出二氧化碳。当人蒙头缩在被子中睡觉时,吸入和呼出的气体都局限在被窝这个小小的空间,难以与外面的空气交流。随着呼吸次数的增加,这小小空间的氧气越来越少,二氧化碳越积越多,就会造 It is a bad habit to be covered with head. People are inseparable from the moment the air, although people breathe gently during sleep, but also inhaled oxygen, exhaled carbon dioxide. When people are messed up and sleep in the quilt, inhaled and exhaled gases are confined to the small space of the bed, making it difficult to communicate with the outside air. With the increase in the number of breaths, less and less oxygen in this small space, carbon dioxide piled up, it will create