求翻译：这一天,我早上吃完饭去奶奶家,在去奶奶家的车上我看见了一位老汉没有座位,我就给他让座位,他很客气,说我身体好站着就可以了,我回答道,难道你身体比我好,之后他笑了笑做了下去,给我说了声谢谢,是什么意思？

On this day, my morning meal to Grandma's House, go to grandmother's House I saw an old man does not have a seat on the train, I would let him, and he was very polite, well said my body stood on it, I replied, does your body better than me, then he smiled, thanks to me,