清潔幹淨的食用水，良好的公共衛生環境，充足完善的營養，是保證身體健康和減少死亡率的主要方法和途徑。

來源: 醫者意也於 2015-12-27 10:32:23 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.