【答案解析】[参考范文]

After SARS epidemic that affected the entire globe was brought under control in China, people have come to realize the impact of public health crises on our life in various ways.
Human beings should behave well every day. Due to the industrial revolution and great economic expansion, people"s life has been challenged in many ways. Owing to the effective health care laws specially aimed at epidemic diseases, public health crises would never happen. Above all, when SARS began to attack Guangdong Province, if the local government officials had followed some specific and unmistakable legal procedures, they would have saved a lot of time for the early treatment of the horrible disease through various measures.
Anyway, in order to prevent public health crises, the government and the people should equip themselves first with the weapon of law. It is necessary for all of us to take actions to protect public health from any potential danger.