9. Couplets: The autumn rain outside the window, the old man in the house "slept beautifully", just shows that he has no attachments and a sense of leisure.
Necklace: The night is over. It is reasonable to say that the old man should get up, but he still wants to "add fragrance and warm the quilt" and intends to continue lying down, vividly depicting the image of a frail and idle old man.
Tail couplet: The old man still hasn't got up in fine weather, but he is watching the red frost and fallen leaves leisurely, which highlights the indifference of the old man's mood. (2 points for each analysis, if the meaning is correct)
leave out