根据下列各句的描述，选择正确的职业，对号入座。

(　　)1．I work with people and money. People give me their money or get their money from me.

(　　)2．I like talking to people. I meet interesting people every day and ask them questions.

(　　)3．I wear a white uniform and I help doctors. Sometimes I work in the day and sometimes at night.

(　　)4．My work is interesting but kind of dangerous. I often catch the thieves and because of my work people feel safe.