“病从口入”是人人皆知的道理。但要养成食前洗手的好习惯，还得从儿时做起。手接触外界物体最多，最易受到污染。特别是孩子，由于手———口动作频繁，更易将不洁的东西吃进体内而生病。据防疫部门检测，一般寄生在手和指甲缝里的病菌、病毒和虫卵共有三十多种。有的科... “Illness from the mouth” is a well-known truth. But to develop a good habit of washing hands before eating, have to start from childhood. Most objects touch the outside world, the most vulnerable to pollution. Especially children, due to frequent hand-mouth movements, easier to get dirty things into the body and sick. According to the epidemic prevention department testing, the general parasitic in the hands and nails in the bacteria, viruses and eggs a total of more than thirty kinds. Some subjects ...