1、Though she hesitated for a moment, she finary went in and asked to see a dress that was in the window. 她雖然猶豫了片刻，但終於還是走進了商店，要求把陳列在櫥窗裏的壹件衣服拿給她看。
2、Wormtail hesitated for a moment, looking as though he might argue, but then turned and headed through a second hidden door. 蟲尾巴遲疑了片刻，似乎還想爭辯，但他還是轉過身，從另壹道暗門出去了。
3、The shock make her hesitate for a moment but she quickly come to herself again. 這壹打擊使她躊躇片刻，但很快就又恢復正常了。
4、He paused for a moment wondering whether to turn back as the captain urged him. 他停了壹會兒，考慮是否像麥克沃爾船長催促的那樣返回。
5、The stranger paused a moment in revery before this tender and calming spectacle. 這個異鄉人在那種溫柔寧靜的景物前出了壹會神。
我的個人總結：
前面3個例句在與hesitate連用時全部用了for a moment；
第4和第5個例句是與pause動詞連用時，前壹個是for a moment ，後壹個是a moment；
結合妳們英語書上說的，總體感覺，兩者在用法上差別似乎不大。
Wait a moment似乎是個例外，可以看作短語，好象沒有見過Wait for a moment的說法。