Suppose your grandma lives in Nanjing. When you hear the weather forecast that the maximum temperature in the next week will be 39 degrees, you call your grandma and tell her what she said.

Grandma: Hey, who is it?

Me: Grandma, it’s me. How are you? Are you feeling well?

Grandma: OK, OK, everything is fine.

Me: I heard from the weather forecast that the weather in Nanjing will be very hot next week, reaching over 39°. Don’t go out during the day. You should go for a walk after the sun goes down and after dinner.

Grandma: Yes, I know.

Me: You should take care of yourself and pay attention to preventing heatstroke and cooling down.

Grandma: Good boy, grandma knows, don’t worry.

Me: That’s good. I have nothing else to do but worry about your health. I won't delay your rest. Goodbye, grandma!

Grandma: Goodbye.