我们需要加强对犯罪分子的监控。
四是窝案串案多。[{'character': '四', 'pinyin': 'sii4', 'highest pitch': 10.44, 'lowest pitch': 9.37, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 9.37, 'lowest pitch': 7.65, 'duration': 0.31, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.12}, {'character': '窝', 'pinyin': 'uo1', 'highest pitch': 11.12, 'lowest pitch': 9.44, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '案', 'pinyin': 'an4', 'highest pitch': 10.77, 'lowest pitch': 8.73, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '串', 'pinyin': 'chuan4', 'highest pitch': 10.62, 'lowest pitch': 8.32, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '案', 'pinyin': 'an4', 'highest pitch': 10.77, 'lowest pitch': 7.49, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '多', 'pinyin': 'duo1', 'highest pitch': 9.71, 'lowest pitch': 8.97, 'duration': 0.29, 'prosody hierarchy': '#4'}]