a.

1. 像姊妹的
   Her bright eyes were full of sisterly affection when she spoke to him.

   對他說話時，她明亮的眼睛充滿了姊妹般的愛。

2. 親密的
   The sisterly chats between the two of them lasted till midnight.

   她們倆之間的親密交談一直繼續到半夜。