What does the passage mainly discuss regarding scientific research?( )

What does the author say can contribute to the improvement of brain function?( )

What is one thing that helps maintain the health of our brain even as it shrinks?( )

What can we conclude from Geoffrey Raisman's finding?( )

What do some people think of aging adults? ( )

What does the author advise us to do in the last paragraph? ( )

What can we do when we become better able to provide ourselves with the desired approval?

What may account for our need to be liked or approved of? ( )

What will happen if we base our self-worth on other people's approval? ( )

What can we conclude from Lao Zi's quotation?( )

What is the main message of the article?( )