而不是和自来水比。提倡喝牛奶可能是因为牛奶相对其它食品更健康
我觉得软化饮用水可能是真的不必要
Milk and milk products contribute many nutrients, such as calcium, vitamin D (for products fortified with vita-min D), and potassium, to the diet. Moderate evidence shows that intake of milk and milk products is linked to improved bone health, especially in children and ado-lescents. Moderate evidence also indicates that intake of milk and milk products is associated with a reduced risk of cardiovascular disease and type 2 diabetes and with lower blood pressure in adults.