The key thing with any shoe, high or flat, is that it should fit properly, not pinch your toes and have a degree of flexibility.
任何高跟或平底鞋的关键是要合脚，不要夹着脚趾，要有一定的灵活性。
3
He and many others agree that maintaining a fit lifestyle is the key to keeping your brain healthy. That means eating right, exercising regularly and remaining socially active.