The reason why a lot of spitting people do whatever they want, spit everywhere, and have no regrets, is because the previous punishment measures are far from the warning, it is more difficult to reach the heart of the spitting person, and there is no shame when spitting Heart, there is no shame after being punished. What does the author think is the best way to punish people who spit? ['Be properly guided.', 'Reach inside.', 'Unspecified.', 'Specific penalties.']