I happened to read something about car rental in the States.
It's said that most rental company wouldn't rent car to persons
under 25, or will charge extra fees.
Now I finally realized how lucky I am. I was thinking of renting a
car (if I can get a Ford Focus ZX5, it'd be awesome!) while my car's
in the auto shop, but my colleagues said that's too expensive and
not worth it at all and propose to take turns to drive me to work
and back home. If I really rented a car, the cost will be even
higher than the quote I got online! (and Hertz might not even let
me rent a car at all!)