因为在这句中,much 不是修饰earthquakes的,而是修饰worry的,worry 是动词词,要用much 修饰,副词词也是；而修饰名词是用as many as,如：The little boy wanted as many candies as his sister.(小男孩儿想要跟他姐姐...as much as修饰不可数名词as many as修饰可数名词是不是啊？？？对，much修饰不可数名词，many修饰可数名词。