23. 已知直线l:(m+2)x+(m−1)y+m−1=0l:(m+2)x+(m-1)y+m-1=0l:(m+2)x+(m−1)y+m−1=0,若直线lll与圆C:(x−1)2+y2=4C:(x-1)^{2}+y^{2}=4C:(x−1)2+y2=4交于AAA,BBB两点,则∣AB∣\vert AB\vert∣AB∣的最小值为((( )))