求救啊

[qpalz]

Desc            STRUC
xx1 dw 0;
xx2 dw 0;
Desc            ENDS

.386p

data segment use16
stru Desc <1,2>
data ends

code segment use16
        assume ds:data
        
start:  mov  ax,9
        mov  stru.xx1,ax
        mov si,offset stru
        mov [si].x1,8;此处错误,undefined symbol : x1
	mov     ax,4c00h
        int     21h
code ends

mov si,offset stru
mov [si].x1,8;
masm里不能这样写吗?

[cnzdgs]

mov [si].Desc.xx1,8