bànlǐ / tuìkuǎn / shí / gùkè / xūyào / xiān / dào / chūnà / chuāngkǒu / tíjiāo / shōujù办理退款时,顾客需要先到出纳窗口提交收据。When processing a refund, customers need to submit their receipts at the cashier window first.