Pandas DataFrame样式器HTML显示没有索引？

import pandas as pd

data = {
    'Name': ['Alice', 'Bob', 'Charlie'],
    'Age': [25, 30, 35],
    'City': ['New York', 'San Francisco', 'Los Angeles']
}

df = pd.DataFrame(data)

html_output = df.to_html(index=False)
print(html_output)

<table border="1" class="dataframe">
  <thead>
    <tr style="text-align: right;">
      <th>Name</th>
      <th>Age</th>
      <th>City</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Alice</td>
      <td>25</td>
      <td>New York</td>
    </tr>
    <tr>
      <td>Bob</td>
      <td>30</td>
      <td>San Francisco</td>
    </tr>
    <tr>
      <td>Charlie</td>
      <td>35</td>
      <td>Los Angeles</td>
    </tr>
  </tbody>
</table>