在我们的日常生活中，经常听到或亲身遇到过一些歹徒手持匕首、菜刀之类的利器行凶作案，持械伤人，一重地影响和威胁着人们的日常工作和生活。由于许多人不懂得怎样去防范和制服这些手持利器的歹徒，所以当自己或他人突然遭到不法分子的侵害之时，或者是被歹徒的突然攻击吓得 In our daily life, we often hear or personally encounter some criminals holding daggers and kitchen knives and other weaponry and committing the crime and assault and wounding people, which seriously affect and threaten people’s daily work and life. Because many people do not know how to guard against and subdue criminals holding weapons, they are scared by criminals or sudden attacks by themselves or others when they are suddenly attacked by criminals