// 边界处理：0辆车返回0，1辆车返回1（无需后续计算）
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Mosquitos began biting humans more than a million years ago | An analysis of 38 modern mosquitoes’ DNA suggests an ancestral mosquito species developed a preference for feeding on early humans between 2.9 and 1.6 million years ago,，更多细节参见WPS下载最新地址
（一）确认应还款金额和还款结果