某人皮肤粗糙晚上看不清东西，那么该人体内可能缺乏（　　）

Weather Report

    Good morning everyone! Here is the weather report for tomorrow.

    It is cold in Beijing. It will rain，and there will be fog. You'd better wear your warm coat, a face mask and take an umbrella with you, if you go out.

    The weather in Sanya will be fine .It will be sunny and hot tomorrow. When you go out and enjoy the sunshine, please put on your sunglasses.

    It is hot in Xishuangbanna(西双版纳). And there will be a heavy rain in Xishuangbanna tomorrow. It will not be a good day for a trip, you'd better stay at home.

    It is windy and cold in Harbin（哈尔滨）. It will snowy. You should put on your warm coat and boots when you go out.

根据短文内容，选择正确答案。

诗《题李凝幽居》中历来被传诵的名句是哪句？你知道有关这句诗的故事吗？这个故事体现了什么？