At first，people with diabetic retinopathy will not notice any symptoms.As the disease gets worse，they may notice blurred(模糊的)vision，black spots or flashing lights.As time goes on，it Can progress to blindness Everyone with diabetes is at risk for diabetic retinopathy，and the risk increases the longer youve had diabetes

　　Fortunately，you can reduce your risk If you do not have diabetes，but think you may be at risk for this condition.visit your doctor to be screened for diabetes.If you d0 have diabetes：

　　Have frequent eye check-ups.

　　Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor There is evidence to show that keeping your blood sugar under tight control can slow down eye damage

　　If you have high blood pressure，follow your recommended diet and medications to keep it under control.If you are not sure whether you have high blood pressure，or whether your blood pressure is under control，discuss this with your doctor

36 Glucose cannot be turned into energy in the body

　　A without diabetes.

　　B without sugar.

　　C without insulin

　　D without food.

　　37 The worditsin the second paragraph refers to

　　A the nerves

　　B the bloods

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