阅读短文，选择正确答案

    Yesterday was Saturday. It was sunny. I got up at 7:30. After breakfast, I went to the beach with Alice. There were many people on the beach. We ran, jumped and played volleyball on the sands. We swam in the sea. Some men fished on a boat. We had a good time. We were tired, but happy.

单词表：beach 海滩 sands 沙滩 tired 疲乏的 volleyball排球

    微笑是上苍赐予我们的最厚重、最珍贵、最神奇的礼物：它可以消解眼中集结的愁云与怒气，它可以驱散心头淤积的悲伤与苦痛，它可以给疲惫者奋起前行的力量，它可以给弱小者寒冬中的温暖，它可以……

请以“微笑”为话题，写一篇600字左右的文章，题目自拟，文体不限。

Where did the man go just now?

已知$\left|\overrightarrow{a}\right|=1,\left|\overrightarrow{b}\right|=3,<\overrightarrow{a},\overrightarrow{b}>={60}^{°},(\overrightarrow{a}-\overrightarrow{c})(\overrightarrow{b}-\overrightarrow{c})=0,$则$\left|\overrightarrow{c}\right|$的最小值是(     )