这是为什么？
大学里有一大批追求苗条和骨感的女孩。[{'character': '大', 'pinyin': 'da4', 'highest pitch': 10.98, 'lowest pitch': 9.82, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '学', 'pinyin': 'xve2', 'highest pitch': 8.82, 'lowest pitch': 7.98, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '里', 'pinyin': 'li3', 'highest pitch': 8.85, 'lowest pitch': 5.27, 'duration': 0.3, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.18}, {'character': '有', 'pinyin': 'iou3', 'highest pitch': 8.25, 'lowest pitch': 7.16, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '一', 'pinyin': 'i2', 'highest pitch': 8.4, 'lowest pitch': 7.23, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '大', 'pinyin': 'da4', 'highest pitch': 10.98, 'lowest pitch': 9.6, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '批', 'pinyin': 'pi1', 'highest pitch': 9.72, 'lowest pitch': 9.42, 'duration': 0.25, 'prosody hierarchy': '#1'}, {'character': '追', 'pinyin': 'zhuei1', 'highest pitch': 9.59, 'lowest pitch': 8.27, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '求', 'pinyin': 'qiou2', 'highest pitch': 8.8, 'lowest pitch': 7.58, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '苗', 'pinyin': 'miao2', 'highest pitch': 10.67, 'lowest pitch': 7.2, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '条', 'pinyin': 'tiao2', 'highest pitch': 10.67, 'lowest pitch': 6.49, 'duration': 0.28, 'prosody hierarchy': '#1'}, {'character': '和', 'pinyin': 'he2', 'highest pitch': 8.63, 'lowest pitch': 8.01, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '骨', 'pinyin': 'gu2', 'highest pitch': 10.47, 'lowest pitch': 7.2, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '感', 'pinyin': 'gan3', 'highest pitch': 10.9, 'lowest pitch': 6.73, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.97, 'lowest pitch': 6.73, 'duration': 0.09, 'prosody hierarchy': '#1'}, {'character': '女', 'pinyin': 'nv3', 'highest pitch': 6.91, 'lowest pitch': 5.8, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '孩', 'pinyin': 'hai2', 'highest pitch': 6.42, 'lowest pitch': 5.3, 'duration': 0.37, 'prosody hierarchy': '#4'}]