Don't be so fussy!　

别那么挑剔！

讲解：

fussy 难以取悦的;挑剔的~~ 有些人就是那么fussy ，呵呵

例句：Don't be so fussy with your food . It's nourish and good to you.

别这样挑食，这很有营养，对你很有好处的。