取完行李后，李先生和杨先生到了海关。
Having claimed their baggage, Mr Li and Mr Yang are at the customs.
如果应用程序逻辑会导致结果对象中的内容没有被取完，那么应该显式地关闭那些资源。
If your application logic can lead to situations when the contents of the result objects may not have all been fetched, then you should explicitly close those resources.
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