John studies day in and day out, so after every exam, he comes off with flying colors.
约翰日夜勤读，所以每次考试，他的成绩都非常好。
After age 50, an exam every two years is recommended to search for, among other things, signs of age-related macular degeneration, a leading cause of blindness in older people.
此外，医生还建议在五十岁以后每两年检查一次眼睛，寻找与年龄相关的、能导致老年人失明的视网膜黄斑性病变信号。
People just diagnosed with type 1 diabetes may be able to wait a few years before having their first dilated eye exam, but then should have one every year after as well.
而对于刚确诊为1型糖尿病的患者，他们不必急着进行第一次眼科检查，可以先等几年，但是此后也应每年检查一次。
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