1. Someone who is a drama queen often overreacts to a situation. 有些小题大做的人经常对一个情景反应过度。
2. In other words, a person's immune system overreacts and produces an allergic reaction. 换句话说，一个人的免疫系统反应过度并产生了过敏反应。
3. But public health officials have also had to consider the risks if the public overreacts to a pandemic declaration. 但是卫生部的官员们也考虑人们对大流行的宣布反应过火的危险。
4. Sometimes it overreacts to what should be a perfectly innocuous food or other substance, causing an allergic reaction. 有时，它会对某种完全无害的食物或其它物质产生过度反应，导致过敏反应。
5. There also exists an aberrant immune response called a cytokine storm, in which the immune system of a healthy individual severely overreacts to a viral infection. 健康人的免疫系统会在细胞激素风暴中与病毒感染产生剧烈的反作用。
