求翻译：Last Monday their term was over．Robert said to his father on the telephone that he was going to travel in a small country during his summer holiday．His father agreed to his plan and posted some money to him．So he started four days ago．Their plane landed on the only airport of the country safely．He took a taxi and got to a hotel in the center of the capital．He felt hungry and tired. So he had a dinner and then a good sleep．This morning he was all right and was going to visit some places of interest．He met an English visitor while he was having breakfast and the man told him to be careful of thieves.是什么意思？

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