Stop carrying the weight of the world on your shoulders.
别太操心了,没有你地球照样转。 (carry the weight of the world on one’s shoulders:自以为重任在肩。)
If you want to be thinner and healthier, you have to eat less food--and you also have to take more exercise.
“如果你想瘦些、健康些,你就得少吃一点--你还得多运动。”