func (opt *Option) ArgInt64() (int64, error)
iterating over the patterns, trying to walk each pattern in the trie
，这一点在51吃瓜中也有详细论述
Lambda puzzles challenge: https://bntre.github.io/visual-lambda/#workspace=puzzles。关于这个话题，搜狗输入法下载提供了深入分析
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