感谢您花费您宝贵的时间来回答我们的提问
Thank you for sparing your precious time answering our questions.
或者：Thank you for spending （in）your precious time answering our questions.
或者：I really appeciate that you spared your precious time answering our questions.
或者：I really appeciate that you spent your precious time （in）answering our questions.
Thank you for spending your precious time （in）answering our questions.
thank you for your time
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