hots文件究竟怎么改才能更新？看了几个帖子都说的不清不楚的，敢不敢给我们小白截个图

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# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host
# localhost name resolution is handled within DNS itself.
#      127.0.0.1       localhost
#       ::1             localhost

这是我的文件里的东西，你们会的说的什么什么东西的添加，到底是添加在哪？还是随便位置都行？127的IP到底整个一行删除还是什么？