[修正报告]
无调整。

[坐标摘要]
A: (0, 0)
B: (4, 0)
O: (2, 0)
O_prime: (2, 1)  // 初始位置，y坐标由滑块k控制

[Geogebra指令]
k = Slider(-5, 5, 1, 1, 150, false, true, false, false)
A = (0, 0)
B = (4, 0)
s = Segment(A, B)
O = Midpoint(s)
O_prime = (2, k)
c1 = Circle(O, A)
c2 = Circle(O_prime, A)
dist_O_prime_A = Distance(O_prime, A)
dist_O_prime_B = Distance(O_prime, B)
sum_dist = dist_O_prime_A + dist_O_prime_B
len_AB = Distance(A, B)
condition = sum_dist > len_AB