"刘老师，你看看这个返送有问题吗？"
刘老师第一时间就发现返送有问题，立即摘掉。[{'character': '刘', 'pinyin': 'liou2', 'highest pitch': 10.42, 'lowest pitch': 7.8, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '老', 'pinyin': 'lao3', 'highest pitch': 10.58, 'lowest pitch': 7.5, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '师', 'pinyin': 'shiii1', 'highest pitch': 9.94, 'lowest pitch': 9.44, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '第', 'pinyin': 'di4', 'highest pitch': 10.18, 'lowest pitch': 9.54, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '一', 'pinyin': 'i1', 'highest pitch': 11.19, 'lowest pitch': 9.61, 'duration': 0.12, 'prosody hierarchy': '#1'}, {'character': '时', 'pinyin': 'shiii2', 'highest pitch': 11.19, 'lowest pitch': 6.42, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '间', 'pinyin': 'jian1', 'highest pitch': 8.77, 'lowest pitch': 6.42, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '就', 'pinyin': 'jiou4', 'highest pitch': 8.84, 'lowest pitch': 7.43, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '发', 'pinyin': 'fa1', 'highest pitch': 9.07, 'lowest pitch': 8.36, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '现', 'pinyin': 'xian4', 'highest pitch': 9.36, 'lowest pitch': 7.64, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '返', 'pinyin': 'fan3', 'highest pitch': 7.75, 'lowest pitch': 3.26, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '送', 'pinyin': 'song4', 'highest pitch': 11.21, 'lowest pitch': 9.46, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '有', 'pinyin': 'iou3', 'highest pitch': 9.46, 'lowest pitch': 6.09, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '问', 'pinyin': 'uen4', 'highest pitch': 7.06, 'lowest pitch': 6.44, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '题', 'pinyin': 'ti2', 'highest pitch': 6.49, 'lowest pitch': 5.79, 'duration': 0.3, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.13}, {'character': '立', 'pinyin': 'li4', 'highest pitch': 10.72, 'lowest pitch': 9.21, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '即', 'pinyin': 'ji2', 'highest pitch': 6.97, 'lowest pitch': 6.0, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '摘', 'pinyin': 'zhai1', 'highest pitch': 8.03, 'lowest pitch': 7.32, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '掉', 'pinyin': 'diao4', 'highest pitch': 8.2, 'lowest pitch': 4.91, 'duration': 0.28, 'prosody hierarchy': '#4'}]