儿童发病前,通常都有先兆“信号”。及时发现这些“信号”,对于疾病的早期诊治有着重要的意义。食欲健康的儿童能按时饮食,食量也较稳定。若发现食欲改变,食量减少或拒食,往往是患病的前兆表现。特别是一些急性病,病状还未出现之前,常常先有食欲的变化。 Before the onset of the child, usually there is a precursor “signal.” Timely detection of these “signals” is of great significance for the early diagnosis and treatment of diseases. Children with healthy appetite can diet on time, food intake is more stable. If found to change appetite, food intake or antifeedant, is often a precursor to illness performance. In particular, some acute diseases, the symptoms have not appeared before, often the first change in appetite.