带围巾是in a scarf还是with a scarf

in a scarf

如：
1、Jamie was snugly wrapped in a white woolen scarf.
杰米围着一条白色羊毛围巾舒适而暖和。

2、She was muffled up in a red scarf.
她用一条红围巾把自己围裹起来。

其它用法还有：
She threw a scarf over her shoulders.
她把披巾随手往肩上一披。

She wrapped a scarf around her neck.
她把一条围巾围在脖子上。

The wind made the girl pull her woollen scarf tightly around her neck.
风使得那个女孩子将她的羊毛围巾紧紧地围在脖子上。

with a scarf
只有穿什么衣服才用in 如in a red coat
小件物品用with 如 in a pair of glasses

wrap a scarf round your neck

with a scarf

in a scarf.

in a scarf