谁不有过放牛的经历，在青草凄凄的小河边，在绿油油的田埂上，或牵着缰绳跟在牛的后面，或悠然自得地骑在牛背上，大腿和屁股暖乎乎的。
B-Person O O O O B-Thing O O O O O O O O O O B-Location I-Location I-Location O O O O O O B-Location I-Location I-Location O O O O B-Thing I-Thing O O B-Thing O O O O O O O O O O O O B-Location I-Location I-Location O B-Thing I-Thing O B-Thing I-Thing O O O O O