有点儿VS一点儿VS一下儿 How do we say "a little" in Mandarin?

<p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica,Arial,sans-serif;hyphens:auto;text-align:justify;" data-flag="normal">Hi！I am Sylvia, your native mandairn teacher from China.</p><p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica, Arial, sans-serif;hyphens:auto;text-align:justify;" data-flag="normal"><br>Are you confused with the expression of "a little bit" in mandarin?<br>Why can't you just say "一点儿“ in mandarin to show all the "a little”?<br><br><br>Hope you will understand how to say the&nbsp; correct " a little" after listening this audio!</p><span><br></span><p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica, Arial, sans-serif;hyphens:auto;text-align:justify;" data-flag="normal"><span>Here are the structures and examples for you to know:&nbsp;</span></p><p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Hel...