3 sentences

1. 为了这么点小事就生气，你太小气了。

   wèi​le zhè​me diǎn xiǎo​shì jiù shēng​qì, nǐ tài xiǎo​qì le.

   You are being too petty to get angry over such a small thing.

   Source: Dong Chinese Dictionary

2. 这么一点小事你都要生气，未免也太小气了。

   zhè​me yī​diǎn xiǎo​shì nǐ dōu yào shēng​qì, wèi​miǎn yě tài xiǎo​qì le.

   It is a bit too petty to get angry over such a trivial matter.

   Source: Dong Chinese Dictionary

3. 他很有钱，但对朋友很小气。

   tā hěn yǒu​qián, dàn duì péng​you hěn xiǎo​qì.

   He is very rich, but very stingy with his friends.

   Source: Dong Chinese Dictionary