你为什么这样做？
学生用力攥小鸭子的身体。[{'character': '学', 'pinyin': 'xve2', 'highest pitch': 8.87, 'lowest pitch': 8.07, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '生', 'pinyin': 'sheng1', 'highest pitch': 10.64, 'lowest pitch': 8.8, 'duration': 0.31, 'prosody hierarchy': '#2'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 11.44, 'lowest pitch': 10.31, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '力', 'pinyin': 'li4', 'highest pitch': 10.66, 'lowest pitch': 7.85, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '攥', 'pinyin': 'zuan4', 'highest pitch': 9.98, 'lowest pitch': 7.85, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '小', 'pinyin': 'xiao3', 'highest pitch': 5.69, 'lowest pitch': 5.41, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '鸭', 'pinyin': 'ia1', 'highest pitch': 9.34, 'lowest pitch': 5.57, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '子', 'pinyin': 'zii5', 'highest pitch': 9.17, 'lowest pitch': 6.86, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 7.31, 'lowest pitch': 6.86, 'duration': 0.09, 'prosody hierarchy': '#1'}, {'character': '身', 'pinyin': 'shen1', 'highest pitch': 11.07, 'lowest pitch': 10.11, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '体', 'pinyin': 'ti3', 'highest pitch': 10.93, 'lowest pitch': 1.27, 'duration': 0.31, 'prosody hierarchy': '#4'}]