She was grateful for everything that the medical andnursing team had done for her. On her day of discharge, we shared in her delightat her recovery. As she was leaving she was eager to say goodbye to each of usin the nursing team. When she reached one nurse, she tried to press afive-pound note into her hand. My colleague refused to accept it, saying thatwe were all just doing our job. The patient looked puzzled, and then replied:“Oh this isn’t for the care I had. I take that as a given. No, this is for setting my hair yesterday.”
上面的一段摘自2021全国卷Ⅰ（乙卷）完形填空题。请问其中的 given 是什么使用方法？
I take that as a given.
这里的 given 前面有不定冠词，说前它是名词吧？但查词典，given 用作名词时意思是“假设事实”“基本事实”“不争的事实”等，感觉用在上面的高考考试题句子中说不通吧！
多查几部词典，你就会发现，作为名词，given还可以是 Something assumed or taken for granted: 即理所当然的事。
