你知道为什么他现在只能用拐杖走路吗？
几年前，他因为没钱医治，致使右腿骨头坏死。[{'character': '几', 'pinyin': 'ji3', 'highest pitch': 8.92, 'lowest pitch': 8.57, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '年', 'pinyin': 'nian2', 'highest pitch': 11.34, 'lowest pitch': 8.25, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '前', 'pinyin': 'qian2', 'highest pitch': 11.34, 'lowest pitch': 7.32, 'duration': 0.38, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.1}, {'character': '他', 'pinyin': 'ta1', 'highest pitch': 9.51, 'lowest pitch': 8.33, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '因', 'pinyin': 'in1', 'highest pitch': 8.89, 'lowest pitch': 8.28, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '为', 'pinyin': 'uei4', 'highest pitch': 8.71, 'lowest pitch': 7.44, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '没', 'pinyin': 'mei2', 'highest pitch': 10.12, 'lowest pitch': 7.25, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '钱', 'pinyin': 'qian2', 'highest pitch': 11.34, 'lowest pitch': 6.8, 'duration': 0.25, 'prosody hierarchy': '#1'}, {'character': '医', 'pinyin': 'i1', 'highest pitch': 10.53, 'lowest pitch': 8.43, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '治', 'pinyin': 'zhiii4', 'highest pitch': 10.6, 'lowest pitch': 6.72, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.25}, {'character': '致', 'pinyin': 'zhiii4', 'highest pitch': 10.6, 'lowest pitch': 7.47, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '使', 'pinyin': 'shiii3', 'highest pitch': 7.72, 'lowest pitch': 6.78, 'duration': 0.28, 'prosody hierarchy': '#1'}, {'character': '右', 'pinyin': 'iou4', 'highest pitch': 10.38, 'lowest pitch': 7.72, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '腿', 'pinyin': 'tuei2', 'highest pitch': 9.58, 'lowest pitch': 8.0, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '骨', 'pinyin': 'gu3', 'highest pitch': 8.68, 'lowest pitch': 6.14, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '头', 'pinyin': 'tou5', 'highest pitch': 7.3, 'lowest pitch': 6.75, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '坏', 'pinyin': 'huai4', 'highest pitch': 10.97, 'lowest pitch': 7.3, 'duration': 0.27, 'prosody hierarchy': 'null'}, {'character': '死', 'pinyin': 'sii3', 'highest pitch': 8.54, 'lowest pitch': 4.63, 'duration': 0.32, 'prosody hierarchy': '#4'}]