suí biàn gěi tīng qǐ lái hěn zì yóu dàn tōng cháng yě yǒu yī gè xīn lǐ fàn wéi

“随便给”听起来很自由，但通常也有一个心理范围。

'Give whatever' sounds very free, but there is usually a psychological range.