In connection with the question about "Pear Blossom in Post Road" in the text, talk about the expressive function of words in the following sentences.

The words "1 so big", "ups and downs", "one after another" and "confused" render the deep and confused atmosphere in Ailao Mountain and imply the difficulty of climbing the mountain. 2. Thick and full, showing the enthusiasm and consideration of the host. Thick words are easy to find, indicating that the owner is careful and thoughtful.

Lao Yu and I mistakenly thought that the Yao old man was the owner of the hut, so we grabbed the old man's hand and rushed to talk and thanked the owner. 4 "Flash Out" not only describes the feeling that the pear tree suddenly found the little girl, but also describes the light and active movements of the little girl, which is in line with their age characteristics.