Kinesics: Body language including postures, movement of body, facial expression. Nodding signifying agreement, upper body incline suggests assuring attitude, smiling implies welcome.

• 动作学：即肢体动作或身体语言，包括姿势、身体移动、面部表情等。点头表示赞同，姿势稍微前倾表现亲切感，微笑表示欢迎。