问$(this).parent().siblings('.classname').show()不工作

EN

<div class="quiz-template">
    <span class="question">1. What is the first word in the first chapter of the series?</span>

    <div class="image-container">
        <img src="img2/q1.png" />
    </div>

    <div class="answer-container">
        <div class="a-choice1">
            <input type="radio" name="qa1" value="0" />
            <label for="btn1"></label>
            <span>The</span>

        </div>

        <div class="a-choice1">
            <input type="radio" name="qa1" value="0" />
            <label for="btn2"></label>
            <span>Albus</span>
        </div>

        <div class="a-choice1">
            <input type="radio" name="qa1" value="0" />
            <label for="btn3"></label>
            <span>Number</span>
        </div>

        <div class="a-choice1">
            <input type="radio" name="qa1" value="1" />
            <label for="btn4"></label>
            <span>Mr.</span>
        </div>
    </div>

    <div class="result-container" id="r1">
        <!--
        <span class="tic mark">✓</span> 
        <span class="cross mark">X</span>
        -->
        <span class="result-text"></span>
        <span class="result-description">
            The first sentence reads, “Mr. and Mrs. Dursley, of number four, Privet Drive, were proud to say that they were perfectly normal, thank you very much.”
        </span>
    </div>
</div>

$('.a-choice1').click(function () {
    $(this).parent().siblings('.results-container').show("fast"); 
});

$(this).parent().siblings('div[id=r '+N+']').show("fast");