stick to do还是doing

例句：

1、If you stick to something doggedly, you're off to a bad start.

固执于某件事只会导致不良的`开端。

2、Fast food the only option and you're famished? Stick to something simple ( like a kids meal) and whatever you do, don't supersize.

如果你饿坏了，而除了快餐别无选择怎么办？那就选一些简单的东西（比如儿童套餐），而且不论吃什么，别撑着。

3、They always stick together to do something.

他们做什么事总是在一起。