【答案解析】[参考范文]

The picture illustrates that most people become less optimistic when they grow up. As is shown in the picture, several adults are crying desperately around a dead plant, while a child is beckoning them to focus on a thriving one. Associating with the words above the dead plant which read "negative information", we learn the intended meaning of the picture that adults should learn from the optimistic child and face reality bravely and look on the bright side when confronted with adversity.
As is known to all, the majority of adults pay too much attention to the bad side instead of the good side once something undesirable happens to them. With pessimism, people can suffer a great loss. For one thing，there is a good chance that you may wreck your health owing to deep sorrow. For another, since you are deeply engaged in sadness or frustration, you may miss the opportunity to make up for your loss. The famous story "It"s never too late to mend" is a case in point.
Considering the proverb which says. "It"s no use crying over the spilt milk," we should learn to be optimistic. First of all, when something bad happens, we should accept it as it is. Then, we need to keep our heads up and try our best to find a way out. [解析] 图中有两株名贵的植物，其中一株已经枯萎死掉，另一株则枝繁叶茂。面对二者，成年人都围着死掉的一株呼天抢地，痛不欲生，只有一个孩子注意到了那株生长良好的植物。枯萎的植物上方醒目地写着“负面消息”四个字。由此可以看出，面对逆境时，成年人往往悲观失望，而天真的孩子往往积极乐观，所以成人应该向孩子学习，积极乐观地面对生活。综上，本文可以按观点论证型作文的思路来完成。
根据提纲，可以这样安排本文的内容与结构：第一段首先对图片进行简单描述并揭示图片寓意——成人应该向孩子学习，身处逆境时要积极勇敢地面对现实并看到事物好的一面；第二段从反面论述观点；第三段总结自己的观点。