我想出来了。了解如何编写巴别塔插件的最佳地方。Here

module.exports = function(babel) {
    const t = babel.types;
    return {
        visitor: {
            FunctionExpression: {
                enter: function(path) {
                    path.traverse(updateThisExpression);
                    //Conversion to arrow functions
                    let arrowFnNode = t.arrowFunctionExpression(path.node.params,
                        path.node.body, false);
                    path.replaceWith(arrowFnNode);
                }
            }
        }
    };
}

const updateThisExpression = {
    ThisExpression: {
        enter: function(path) {
            //Converting all this expressions to identifiers so that
            //it won't get translated differently
            path.replaceWith(t.identifier("this"));
        }
    }
};

编写另一个访问者对象，用于在“FunctionExpression”访问者中遍历。）

这里有一些有用的链接来编写自定义巴别塔访问者插件。
https://babeljs.io/docs/en/babel-types
https://github.com/jamiebuilds/babel-handbook/blob/master/translations/en/plugin-handbook.md
https://babeljs.io/docs/en/babel-standalone
如果要在节点js中执行此操作，则需要安装@babel-core

npm install --save-dev @babel/core

下面是一些示例代码：

let babel = require("@babel/core");
let fs = require('fs');

fs.readFile('testcase1client.js', 'utf8', function(err, tc1c)
{
    if(err)
        console.log(err);

    let out1 = babel.transform(tc1c, { plugins: [
    {
        visitor: {
            FunctionExpression(path) {
                // console.log(path.parent.id.name);

            },
            CallExpression(path) {
                // console.log(path.node.callee.name);
                
            }
        }
    }]});

    console.log(out1.code);
}