Please carefully study the following patient case summary, conduct a comprehensive and in-depth treatment planning analysis, and clearly provide the selected treatment for the patient.

{case}

---

**Format to Follow:**

```
### Chain of Thought:
[Please sort out your thinking process step by step, with each logical step in a separate paragraph, and use a format such as <step 1> to label each step.]
<step 1> Specific thinking content of this step
<step 2> Specific thinking content of this step
...
<step n> Specific thinking content of this step

### Answer:
[Just output the selected treatment for the patient without any other explanation.]
```