How to deal with nagging people?

So have few family members, including my mom, who are base in general and particularly nagging. For example my mom (she's uneducated) keeps nagging me on not eating out that I may get sick when she clearly doesn't understand, or at best misunderstands, health and nutrition. Or for example, when I am driving she will nag me on not taking this turn because the car will travel 100 feet more and this will burn more fuel. This is when my family is not at all poor : in fact we are rich from my country's standards. This kind of nagging happens repeatedly even after I explain the correct things, and she does this for almost everything to the point that my dad get super mad at her. I think her mind might be too base to understand simple things. Most of the time I say OK and ignore her, but sometimes I get pretty annoyed. So I was wondering today what would Buddha do with such people ? Would he simply ignore or would you try to teach them? Any advice on such people from the Suttas or personal experience? Thank you.