Please help think about it, thank you!

One day, on her way to school, Xiaohong saw an old woman. Her apple fell to the ground. Xiaohong saw it and said, Grandma, let me help you pick it up! Grandma said no, you go home! Mom will be very anxious. Xiaohong didn't wait for grandma to finish. After picking it up, she also sent the apple to her grandmother's house. Grandma said, thank you. Xiaohong said it doesn't matter. Xiaohong said I should go. Bye, grandma. Xiaohong said goodbye to grandma.