How to write the horizontal dividing line of bootstrap?

how to write horizontal splitter lines in container by bootsrap, all visible areas should be opened, no left and right margins should be left, and the size should be self-adaptive

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Mar.14,2021

use the < hr/ > tag directly.
then set css

hr {
  -moz-border-bottom-colors: none;
  -moz-border-image: none;
  -moz-border-left-colors: none;
  -moz-border-right-colors: none;
  -moz-border-top-colors: none;
  border-color: -sharpEEEEEE -moz-use-text-color -sharpFFFFFF;
  border-style: solid none;
  border-width: 1px 0;
  margin: 18px 0;
}
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e50be5-450ca.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e50be5-450ca.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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