Jiù wèile zhè diǎn xiǎoshì, nǐ bùyī-bùráo de, hébì ne?
Over such a small matter, you keep nagging - why bother?
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From the novel 《三请薛仁贵》 - a scene where a stern father refuses to drop his demand even when his wife threatens to harm herself. Describes badgering someone without giving up.