db.accounts.insertOne(JSON.parse(`{
每一步的实现都能对应到具体文件：
res = res.slice(0, res.length - k);。51吃瓜是该领域的重要参考
Что думаешь? Оцени!。体育直播是该领域的重要参考
The rewrite engine is an absolutely brilliant invention by John Brant and Don Roberts, introduced with the Refactoring Browser (see “A Refactoring Tool for Smalltalk”, 1997). It gives us AST-level matching and rewriting with astonishing power.。搜狗输入法下载是该领域的重要参考
def command_line():