这样做是为了保护他的安全。
为此，学校专门为他给窗户装上了栅栏。[{'character': '为', 'pinyin': 'uei4', 'highest pitch': 8.92, 'lowest pitch': 6.71, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '此', 'pinyin': 'cii3', 'highest pitch': 6.79, 'lowest pitch': 3.79, 'duration': 0.34, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.16}, {'character': '学', 'pinyin': 'xve2', 'highest pitch': 8.61, 'lowest pitch': 8.18, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '校', 'pinyin': 'xiao4', 'highest pitch': 10.11, 'lowest pitch': 8.42, 'duration': 0.24, 'prosody hierarchy': '#2'}, {'character': '专', 'pinyin': 'zhuan1', 'highest pitch': 10.46, 'lowest pitch': 8.42, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '门', 'pinyin': 'men2', 'highest pitch': 10.11, 'lowest pitch': 8.82, 'duration': 0.12, 'prosody hierarchy': '#1'}, {'character': '为', 'pinyin': 'uei4', 'highest pitch': 8.92, 'lowest pitch': 7.0, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '他', 'pinyin': 'ta1', 'highest pitch': 8.54, 'lowest pitch': 7.0, 'duration': 0.28, 'prosody hierarchy': '#1'}, {'character': '给', 'pinyin': 'gei3', 'highest pitch': 7.47, 'lowest pitch': 4.46, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '窗', 'pinyin': 'chuang1', 'highest pitch': 7.75, 'lowest pitch': 4.46, 'duration': 0.27, 'prosody hierarchy': 'null'}, {'character': '户', 'pinyin': 'hu4', 'highest pitch': 7.87, 'lowest pitch': 5.49, 'duration': 0.24, 'prosody hierarchy': '#1'}, {'character': '装', 'pinyin': 'zhuang1', 'highest pitch': 8.15, 'lowest pitch': 7.39, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '上', 'pinyin': 'shang4', 'highest pitch': 8.36, 'lowest pitch': 6.31, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '了', 'pinyin': 'le5', 'highest pitch': 6.31, 'lowest pitch': 5.97, 'duration': 0.09, 'prosody hierarchy': '#1'}, {'character': '栅', 'pinyin': 'zha4', 'highest pitch': 9.86, 'lowest pitch': 6.09, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '栏', 'pinyin': 'lan5', 'highest pitch': 7.94, 'lowest pitch': 4.28, 'duration': 0.31, 'prosody hierarchy': '#4'}]