某地属山区，长年累月多阴雨天，天气寒冷、潮湿。客厅内有开放式炉灶，日夜燃烧，一边取暖，一边烤食品，燃料为当地产的浅层煤块。当地农民多有黄褐色或黑褐色斑牙。腰背、四肢大关节疼痛，肢体、脊柱骨骼变形者亦有之。 此型疾病的主要预防措施是（）
A.预防性服药
B.降低饮水中氟含量
C.降低食物中氟含量
D.改换燃料、改良炉灶（增设烟囱）
E.加强营养
参考答案：D
| 根据对话内容，选择正确的选项，两项多余。 | |
| Doctor: What's the matter with you, Cindy? Cindy: 1.________ Doctor: When did it start? Cindy: 2.________ Doctor: Please lie down on the bed and I'll examine you. Cindy: Yes, doctor. Doctor: Well, there's nothing serious with you. 3.________ Cindy: No, doctor. I'm busy and I hardly have much time for exercise. I only exercise on Sunday. Doctor: How do you sleep? Cindy: Very badly, doctor. 4.________ Doctor: No. You don't need medicine. Just take more exercise. Cindy: You are right, doctor. I should exercise to keep healthy. 5.________ Doctor: You're welcome. I hope you will feel better soon. | |
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