如题所述
æµéä½é¿æ¯ä»è©è骨ä¸ä¸è 骨çç»åç¹ï¼å°é«éª¨ç»èåºçæççä¸ä¸ªé¿åº¦ã身é¿çæµéä¸è¬é½æ¯ä»çççé¢é¨æµå°å°¾æ ¹(ä¸å 头é¿åå°¾é¿)
ä½é«æ¯C---Dç¹çé«åº¦ï¼ä½é¿æ¯A---Bç¹çé¿åº¦ã