Simultaneous y=kx+b and elliptic equation eliminate y to get the quadratic equation of x, and the discriminant is greater than 0 to get 4k2+1>; b^2。

The distance between the two sections is equal, which is converted into the abscissa distance, that is, the absolute value of the difference between the two roots of the equation of X is equal to 4 MINUS the larger root. If this problem is big and needs to be calculated and analyzed, but it is a multiple-choice question and only asks for existence, then the bigger root must be on the right side of the Y axis, and the absolute value of the difference between the two roots is less than 4, which can be repeated, so you can choose A. And it's easy to find by drawing a picture ~ ~