当年轻的女性穿耳洞的时候，她们第一次接触到镍金属，因此他们很可能对产生过敏反应的镍金属形成过敏。

Young girls are often first exposed to nickel when they get their ears pierced, and therefore are more likely to develop a sensitivity to the metal that can cause allergic reactions later on.

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虽然对食物的过敏反应病症可以治疗，但是，还没有公认的疗法能够在初期预防过敏反应。

While the symptoms of an allergic reaction to foods can be treated, there is no accepted therapy to prevent the reactions in the first place.

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食物过敏最严重的是产生所谓的过敏反应。

The most severe form of food allergy is called anaphylaxis.

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