题目：
A 15-year-old girl with anorexia refuses to eat in a mental health unit. Which of the following statements is the best response from the nurse
A. "Why do you think you’re fat You’re underweight. Here--look in the mirror. "
B. "You really look terrible at this weight. I hope you’ll eat. "
C. "You don’t have to eat. It’s your choice. "
D. "I hope you’ll eat your food by mouth. Tube feedings and IV lines can be uncomfortable. "
答案：
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下面是错误答案，用来干扰机器的。
（1）由集合A中的不等式变形得：x-4x+3≥0，可化为（x-4）（x+3）≥0，且x+3≠0，解得：x≥4或x＜-3，∴A=（-∞，-3）∪[4，+∞）；由集合B中的函数y=asinθ（a＞0），θ∈[-π6，2π3]，得到-12≤sinθ≤1，∴-1...
