假定上周六晚上，你们全家在一家饭店就餐．请你根据以下要点提示．用英语写一篇短文，描述事情发生的经过，并适当加以评论．
    要点提示：
    （1）邻桌年轻人大声说笑、吸烟．
    （2）你请他们不要那样做．
    （3）他们不听，反而嘲笑你．
    （4）你认为：①他们在公共场所那样做是不对的．
              ②年轻人是天津的未来，应该…
  参考词汇：嘲笑laugh at
  要求：
    （1）词数：80～100个．
    （2）短文开头已给出，不计入总词数．
    （3）要点齐全，行文连贯，可适当发挥．
Last Saturday evening，all my family had dinner in a restaurant．

We were enjoying ourselves when something disturbing happened．A group of young people were sitting at the table nearby．While they were eating their food，they talked loudly and smoked cigarettes，making the restaurant full of noise and smoke．I tried to stop them doing so，but they refused to listen to me．Instead，they said it was none of my business and laughed at me．
（评论和看法）In fact，what they did upset me deeply，but I was proud of what I did．In my opinion，one should keep quite and not affect others when in public．Therefore it's completely bad behavior to do that in the restaurant．What's more，we should always watch our manners and pay attention to public morality，as young people are the future of Tianjin．

We were enjoying ourselves when something disturbing happened．A group of young people were sitting at the table nearby．While they were eating their food，they talked loudly and smoked cigarettes，making the restaurant full of noise and smoke．I tried to stop them doing so，but they refused to listen to me．Instead，they said it was none of my business and laughed at me．
（评论和看法）In fact，what they did upset me deeply，but I was proud of what I did．In my opinion，one should keep quite and not affect others when in public．Therefore it's completely bad behavior to do that in the restaurant．What's more，we should always watch our manners and pay attention to public morality，as young people are the future of Tianjin．

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