3 sentences

1. 仔细观察你的孩子。

   zǐ​xì guān​chá nǐ de hái​zi.

   Carefully observe your child.

   Source: CCMatrix

2. 仔细观察每个人。

   zǐ​xì guān​chá měi​ge​rén.

   Observe everybody carefully.

   Source: OpenSubtitles

3. 他的母亲仔细观察他的面容想查明他是否说真话。

   tā de mǔ​qīn zǐ​xì guān​chá tā de miàn​róng xiǎng chá míng tā shì​fǒu shuō zhēn huà.

   His mother scanned his face to see if he was telling the truth.

   Source: UM-Corpus: Education