当前个人信息泄露被不法分子用于牟利已成为社会问题。相较于当前市场买卖成风的银行卡信息，征信记录中不仅同样包含用户基本信息，还涵盖有消费习惯、社交网络、违约记录等一系列秘密数据，一旦泄露容易引发欺诈、敲诈等恶性行为，后果严重。这表明（  ）

①市场经济具有盲目性，会导致市场秩序的紊乱

②市场不是万能的，市场失灵需要弥补

③重视计划调节的作用，发挥计划的基础性功能

④无形之手之不足，需有形之手来助力

阅读下面短文，根据短文内容回答问题

Dear Wang Fang,

    Thank you for your letter. You wrote to ask me about American social customs(风俗) in their dinner party. You are asking the right person. I once lived in America for five years. Now I'll tell you something about it.

    It's a good idea to bring a small present when you go to a dinner party. Flowers are always nice, or you may bring a bottle of wine if you know that your friends drink it.

    You should arrive(到达) on time or five minutes late. Don't get there early. If you're going to be more than fifteen minutes late, you should call before.

    Try to be free at the dinner table. If you don't know about choosing(选择) the right fork or knife, just watch the other people, and follow them. If you still have no idea of what to do, ask the person beside you .

    If you like the food, say so. Of course, you'll thank them for the meal and for their kindness. It's also a good idea to send a card to thank them the day after.

Rose

Answer the following questions with No More Than 5 Words