diff --git a/Assets/Scripts/Interaction/TouchPositionHandler.cs b/Assets/Scripts/Interaction/TouchPositionHandler.cs
index 9183d21..c092705 100644
--- a/Assets/Scripts/Interaction/TouchPositionHandler.cs
+++ b/Assets/Scripts/Interaction/TouchPositionHandler.cs
@@ -25,7 +25,7 @@ public class TouchPositionHandler : MonoBehaviour
         if (_meshRenderer != null)
         {
             _meshRenderer.enabled = true;
-            // 只显示描边，填充透明
+            var col = GetComponent<Collider>(); if (col == null) { var sc = gameObject.AddComponent<SphereCollider>(); sc.radius = 0.3f; }            // 只显示描边，填充透明
             var mat = _meshRenderer.material;
             if (mat != null && mat.HasProperty("_MainColor"))
             {