已知圆C：(x－3)²＋(y－4)²＝4，直线l₁过定点A(1，0)．

(1)若l₁与圆相切，求l₁的方程；

(2)若l₁与圆相交于P、Q两点，线段PQ的中点为M，又l₁与l₂：x＋2y＋2＝0的交点为N，判断AM·AN是否为定值？若是，则求出定值；若不是，请说明理由．

_____, the worse I seem to feel.

A．When I take more medicine

B．The more medicine I take

C．Taking more of the medicine

D．More medicine taken