Load segmention cannot be displayed in three views properly

Operating system:windows11
Slicer version:slicer 5.7.0
Expected behavior:I first opened a nii file for a brain tumor, and then opened a corresponding nii file for segmentation results. In three views, I should be able to display the patient image and segmentation results.

Actual behavior:I first opened a nii file for a brain tumor, and then opened the corresponding segmentation results. The segmentation result does not display properly in the three views.

I suggest you look at some of the basic documentation, for example

The View Data section of Getting started:
https://slicer.readthedocs.io/en/latest/user_guide/getting_started.html#view-data

Basic tutorials such as the 4 minute tutorial and the “Data Loading and 3D Visualization” tutorial for 5.x:
https://www.slicer.org/wiki/Documentation/Nightly/Training#Slicer4Minute_Tutorial