某人在夜晚路过一路灯下，先向路灯走近，然后走远，那么，此人的影子长短变化情况应是(    )

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    Traveling abroad during the vacation is the top choice of many Chinese people. But do we have good manners abroad?

    On Feb 25, a report said that a Chinese mother let her child pee (小便) in front of a shop in Tokyo. A journalist came to the mother. Instead of saying sorry, the woman said that her child had peed inside a plastic bag and had not made the floor dirty.

    This case has caused a big discussion about Chinese people' s traveling manners again.

    In recent years, improper behavior has become a real embarrassment for China as overseas tourism increases. With the improvement of living standards, more and more Chinese are traveling abroad. But there are still a number of Chinese lacking in (缺乏) a sense of public manners. For this situation, the Chinese government has suggested proper manners. The National Tourism Administration has made a list of tourists' worst behaviors, including littering, line-jumping, taking off shoes and socks in public, speaking loudly and smoking in non-smoking areas.

    We are going to improve the inner being of every Chinese citizen. “Traveling manners are a turning point.” said an official. And changes have begun to appear. Most people minded their behaviors during this Spring Festival holiday, according to the National Tourism Administration. They kept their voice down, waited in line and respected local rules.