From the standopint of ecnomics, the season of eating watermelon is also the season which has a best watermelon price, and eating it can get the porpurse of heatstroke prevention.

• 从经济学角度来考虑，吃西瓜的季节同样也是西瓜便宜的季节，而这个时候吃西瓜更能起到防暑降温的效果。