15. (3 points) "One after another" is an adjective, the meaning of chaotic and dazzling. On the one hand, the poem uses it to write out the weather of the Qingming Festival, which is characterized by continuous drizzle; on the other hand, it also writes out the complicated sadness in the poet's heart, which is constantly being cut out, and is still in a mess, so that the scenes are blended and the mood is vivid. (Therefore, the pen with puns, both writing the scene, but also writing feelings, and for the following "I ask where the tavern is?") ) (Selected answers in parentheses)