例如将以下三条结果合并为后者
我很 开胃<span style='background-color:greenyellow'>健脾</span>补元气
<span style='background-color:greenyellow'>我</span>很 开胃健脾补元气```
```<span style='background-color:greenyellow'>我</span>很 <span style='background-color:greenyellow'>开胃</span><span style='background-color:greenyellow'>健脾</span>补元气```
还是只能自己实现?