diff --git a/_list.vp b/_list.vp
index ff5e35d..6aae831 100644
--- a/_list.vp
+++ b/_list.vp
@@ -50,29 +50,37 @@ class list[T]:
             string.memcpy(new_data, self.__data__, self.__count__ * self.__elem_size__)
             self.__data__     = new_data
             self.__capacity__ = new_cap
-        elem_ptr: T* = T*(uint64(self.__data__) + self.__count__ * self.__elem_size__)
+        # 元素地址：`T*(self.__data__ + i * elem_size)`。
+        # · rawptr 就是 i8*，i8* 上的 `+` 按 **1 字节**缩放（ExprGenOps 的指针算术分流
+        #   → ExprGenBase.translate_ptr_arith 按 pointee 大小缩放）⇒ 与原先
+        #   `uint64(ptr) + n` 再强转回指针**逐字等价**，故去掉整数往返。
+        # · 步长仍由 __elem_size__ **显式**给出，不能改成下标访问（`__data__[i]` 会按
+        #   sizeof(T) 缩放）：list[int](pool, 8) / list[str](pool, 64) 这类"按显式步长
+        #   当字节缓冲"的用法依赖它。
+        # 下面 get/set/__getitem__/__setitem__/pop/__next__ 同此式，不再重复注释。
+        elem_ptr: T* = T*(self.__data__ + self.__count__ * self.__elem_size__)
         elem_ptr[0] = item
         self.__count__ += 1
 
     def get(self, index: sizet) -> T:
-        elem_ptr: T* = T*(uint64(self.__data__) + index * self.__elem_size__)
+        elem_ptr: T* = T*(self.__data__ + index * self.__elem_size__)
         return elem_ptr[0]
 
     def __getitem__(self, index: sizet) -> T:
-        elem_ptr: T* = T*(uint64(self.__data__) + index * self.__elem_size__)
+        elem_ptr: T* = T*(self.__data__ + index * self.__elem_size__)
         return elem_ptr[0]
 
     def set(self, index: sizet, value: T):
-        elem_ptr: T* = T*(uint64(self.__data__) + index * self.__elem_size__)
+        elem_ptr: T* = T*(self.__data__ + index * self.__elem_size__)
         elem_ptr[0] = value
 
     def __setitem__(self, index: sizet, value: T):
-        elem_ptr: T* = T*(uint64(self.__data__) + index * self.__elem_size__)
+        elem_ptr: T* = T*(self.__data__ + index * self.__elem_size__)
         elem_ptr[0] = value
 
     def pop(self) -> T:
         self.__count__ -= 1
-        elem_ptr: T* = T*(uint64(self.__data__) + self.__count__ * self.__elem_size__)
+        elem_ptr: T* = T*(self.__data__ + self.__count__ * self.__elem_size__)
         return elem_ptr[0]
 
     def clear(self):
@@ -87,5 +95,5 @@ class list[T]:
             raise StopIteration
         idx: sizet = self.__iter_index__
         self.__iter_index__ = idx + 1
-        elem_ptr: T* = T*(uint64(self.__data__) + idx * self.__elem_size__)
+        elem_ptr: T* = T*(self.__data__ + idx * self.__elem_size__)
         return elem_ptr[0]