详细解释:a. 按菜单点菜的
ad. 按菜单点菜
英语解释：
名词 a la carte:
a menu having individual dishes listed with separate prices形容词 a la carte:
(of a restaurant meal) having unlimited choices with a separate price for each item副词 a la carte:
by ordering items listed individually on a menu例句：
Let's dine a la carte.我们吃点菜吧。