一、突发不良和慢性不良 不良的发生形态可以分为突然发生的突发不良和慢性发生的慢性不良两种,问题在后一种上。 由于很难掌握住慢性不良的原因,因而采取对策也比较困难。有时想出许多办法,用起来结果并不好。往往就放手不管了。所以要求改变历来的看法,采用新的对策。 二、慢性不良为什么不能减少,归纳起来有五个问题 First, sudden failure and chronic adverse malformations can be divided into sudden occurrence of sudden failure and chronic adverse chronic two, the problem in the latter. Since it is difficult to grasp the causes of chronic badness, it is also difficult to take countermeasures. Sometimes I come up with many ways to use it and it is not very good. Often leave it alone. Therefore, it is required to change the historical views and adopt new countermeasures. Second, why can not reduce chronic bad, summed up five problems