1.原材料引用（Materials）
In all the cases, witnesses saw the event happen. More than one thousand of the victims received some kind of medical assistance from witnesses. Seven hundred and twelve received CPR. Four hundred and thirty-nine received chest presses only. No mouth-to-mouth rescue breaths were given to them.
2.信息和事实（Facts）
3.感受和评价（Commens）
1.最近论文的问题让我有些情绪波动，这种情绪波动影响到每天的晨读。
4.统计累计的练习小时数（Hours）
累计16+0.5=16.5小时
