阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

Being grateful has positive effects on both physical and mental health . Studies have founD.that giving thanks can help people sleep better ,reduce stress and improve interpersonal relationships. _____ 41_____ Here are some tips for you.

Start A.thank-you journal. Make it A.habit to write down the things that you're grateful for. _____42_____ Make it as easy as possible.

Write A.letter. Some people may have helped you on some occasions, but you didn't have A.chance to thank them in time. Think of them and send them A.letter. _____ 43_____

Think small . The smaller you start, the more you will be able to see things you're grateful for. For example ,A.bus driver picks you up. _____ 44_____ You may think, “I'm going to write about this later in my journal. I'm so grateful for this. ”

_____45_____ Take notice of everything that makes up your environment . Think of the sky ,the cool air, and the warmth of your sweater . The act of simply noticing and naming things is A.great way to express gratefulness . Being grateful reminds you of your connection with the world around you.

A. Pay attention to the world around you.

B. He is really nice or waits an extrA.minute for you.

C. How do you express gratefulness in your daily life?

D. Even better, deliver it in person and read it to them.

E. You can write in your notebook or do it on your phone.