為甚麼有些人飲奶後會肚阿, 有些人又不會? 肚阿的人是否就是對牛奶敏感的意思?
By handycapgentman (middle-school student) on 2013-02-19 Answers 1 Views 1897
By JaysonKann (pupil) on 2013-02-21
呢類人多數係因為佢地的身體未能消化牛奶入面的乳糖.