资料题：How did the writer think about the policeman's help（　）。

Last summer I visited Mexico City to see the ancient art in the museum there.I was surprised at how well I managed to get around even though I don't speak a word of Spanish.You have to be able to make the right decision in a bad situation.The manager of my hotel gave me a map of the city and told me that the best way to the museum was by subway.I didn't know where the nearest subway was.I was completely lost.Just then a policeman came over and showed me the nearest station.I looked at the subwaymap on the wall and didn't know which line to take.In fact, I wasn't sure which station I Wasin.Most people would give up in that situation, but not me.After I thought it over, I knew exactly what to do.I went up stairs and took a taxi.