Do you ever find yourself getting really unhappy for almost no reason? Or suddenly feeling down without knowing why? Going from sadness to anger to joy in a matter of minutes can make many teens feel as though they're losing control. But why is the feeling so common among teens?

    Maybe you're starting a new school and not able to see old friends as much. Getting good grades or wanting to be better in sports or other activities can be a concern (关注) for many teens.

    Being accepted by friends is important. Teens also may notice, for the first time, a sense of distance from parents and family. You may feel you want to be on your own and make your own decisions, but it can also seem a bit lonely at times.

    Another important cause for mood swings is biology. When puberty (青春期) begins, the body starts producing hormones (荷尔蒙). These hormones cause physical changes in the body. But in some people, they also seem to cause emotional (情绪的) changes.

    Here are some things you can do that might make those bad moods a bit easier to deal with.

    Recognize you're not alone. Although not every teen experiences mood changes to the same degree, they are common.

    Talk to people you trust. Friends can help each other by realizing that they're not alone in their feelings. Talking to parents is important, too. Parents can share their own experiences dealing with bad moods. Teachers are often good resources and a doctor can help to answer questions about development.

    Get enough sleep. Though it can be hard to find enough time, getting enough rest is very important. Being tired can lead to more sadness.

    Create. Taking part in some kinds of activities, like building something out of wood, or starting an art or music piece. Writing can help you organize and express your thoughts and feelings. Get your thoughts on paper. Do the same thing with paint, music, or other art forms. Put your feelings into your artwork.

“有心栽花花不开，无心插柳柳成荫”。在此俗语中，柳树的繁殖方式是____ ，这种繁殖方式属于____ 生殖。

长江三角洲地区有许多著名的旅游景点，作为世界文化遗产的____古典园林和____西湖，就是其中的杰出代表。

阅读下面的文言文，完成下列小题。

    侯蒙，字元功，密州高密人。未冠，有俊声，急义好施，或一日挥千金。进士及第，调宝鸡尉，知柏乡县。民讼皆决于庭，受罚者不怨。转运使黄湜闻其名，将推毂之，召诣行台白事，蒙以越境不肯往。湜怒，他日行县，阅理文书，欲翻致其罪；既而无一疵可指，始以宾礼见，曰：“君真能吏也。”率诸使者合荐之。

    西将高永年死于羌，帝怒，亲书五路将帅刘仲武等十八人姓名，敕蒙往秦州逮治。至秦，仲武等囚服听命，蒙晓之曰：“君辈皆侯伯，无庸以狱吏辱君，第以实对。”案未上，又拜御史中丞。蒙奏言：“汉武帝杀王恢，不如秦缪公赦孟明；子玉‚缢而晋侯喜，孔明亡而蜀国轻。今羌杀吾一都护，而使十八将繇之而死，是自艾其支体也。欲身不病，得乎？”帝悟，释不问。

    迁刑部尚书，改户部。比岁郊祭先期告办，尚书辄执政，至是，帝密谕之。对曰：“以财利要君而进，非臣所敢。”一日，帝从容问：“蔡京何如人？”对曰：“使京能正其心术，虽古贤相何以加。”帝颔首，且使密伺京所为。京闻而衔之。

    大钱法敝，朝廷议改十为三，主藏吏来告曰：“诸府悉辇大钱市物于肆，皆疑法当变。”蒙曰：“吾府之积若干？”曰：“八千缗。”蒙叱曰：“安有更革而吾不知！”明日，制下。又尝有凡事蒙独受旨，京不知也；京侦得之，白于帝，帝曰：“侯蒙亦如是邪？”罢知亳州。

    宋江寇京东，蒙上书言：“江以三十六人横行齐魏官军数万元敢抗者其才必过人今青溪盗起不若赦江使讨方腊以自赎。”帝曰：“蒙居外不忘君，忠臣也。”命知东平府，未赴而卒，年六十八。

（节选自《宋史·侯蒙传》）

【注】①王恢：伏击匈奴，单于察觉而撤军。汉武帝大怒，曰：“今不诛恢，无以谢天下！”②子玉：楚成王时为令尹。晋楚城濮决战，楚军败，未遇赦，子玉自杀。