如何避免在读取文件时跳过UTF-8 BOM

 ```python

 with open('file.txt', 'r', encoding='utf-8-sig') as f:

     content = f.read()

 ```

 ```java

 BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("file.txt"), StandardCharsets.UTF_8));

 String line;

 StringBuilder content = new StringBuilder();

 while ((line = reader.readLine()) != null) {

     content.append(line);

     content.append(System.lineSeparator());

 }

 reader.close();

 ```

 ```javascript

 const fs = require('fs');

 const iconv = require('iconv-lite');

 const content = iconv.decode(fs.readFileSync('file.txt'), 'utf8');

 ```