首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3601篇
  免费   320篇
  国内免费   7篇
耳鼻咽喉   42篇
儿科学   123篇
妇产科学   77篇
基础医学   426篇
口腔科学   112篇
临床医学   487篇
内科学   546篇
皮肤病学   45篇
神经病学   563篇
特种医学   92篇
外科学   346篇
综合类   30篇
一般理论   11篇
预防医学   511篇
眼科学   33篇
药学   248篇
中国医学   6篇
肿瘤学   230篇
  2024年   10篇
  2023年   40篇
  2022年   42篇
  2021年   163篇
  2020年   114篇
  2019年   139篇
  2018年   160篇
  2017年   132篇
  2016年   112篇
  2015年   122篇
  2014年   134篇
  2013年   235篇
  2012年   275篇
  2011年   317篇
  2010年   174篇
  2009年   140篇
  2008年   227篇
  2007年   278篇
  2006年   233篇
  2005年   204篇
  2004年   178篇
  2003年   160篇
  2002年   139篇
  2001年   18篇
  2000年   16篇
  1999年   25篇
  1998年   27篇
  1997年   20篇
  1996年   15篇
  1995年   14篇
  1994年   8篇
  1993年   7篇
  1992年   4篇
  1991年   5篇
  1990年   8篇
  1989年   6篇
  1988年   5篇
  1987年   6篇
  1986年   2篇
  1985年   2篇
  1984年   3篇
  1983年   2篇
  1981年   1篇
  1977年   2篇
  1973年   1篇
  1972年   1篇
  1969年   1篇
  1968年   1篇
排序方式: 共有3928条查询结果,搜索用时 250 毫秒
991.
Domestic violence is one of the most common causes of serious injury among women. Domestic violence victims endure physical and psychological sequelae that often go undetected by the health care professionals they encounter. There are many barriers women who are victims of domestic violence face. Women of color encounter additional barriers such as stereotypes that construct domestic violence as a "minority" issue. This article surveys the relevant literature to provide the reader with a review of the current state of knowledge for this special sub-population of domestic violence victims. Health care professionals need to be aware of the issues of this sub-population and be appropriately educated and trained to actively screen them. In addition, health care professionals need to be culturally sensitive to the needs of women of color who may experience domestic violence in order to appropriately screen and refer women for services that meet their needs.  相似文献   
992.
993.
994.
Twenty children with mental retardation (MR), age 7-12, completed a phonological reading skills program over approximately 10 weeks. As a result of the instruction, they were better able to sound out learned and transfer words compared to a control group matched on age, IQ, nonword reading, language comprehension, and phonemic awareness. Final sounding out was predicted by beginning reading skill in both groups, by phonemic awareness and articulation speed in the control group only, and by general language ability in the instruction group only. Neither IQ nor verbal working memory correlated significantly with final sounding out ability in either group. It is suggested that the instruction succeeded in compensating for weaknesses in phonemic awareness and speech articulation, but favored those who had better language skills.  相似文献   
995.
Cognitive-behavioral therapy (CBT) with exposure and response prevention is a first-line intervention for adult and childhood obsessive-compulsive disorder. Methodologically rigorous controlled trials have suggested that benefits from CBT exceed those from placebo and attention-control conditions and have similar or greater efficacy than serotonergic monotherapy. This article reviews the nature of CBT and associated outcome data, highlighting recent empiric findings in the treatment literature.  相似文献   
996.
Depression and Genetic variation in serotonin and monoamine transmission have both been associated with body mass index (BMI), but their interaction effects are not well understood. We examined the interaction between depressive symptoms and functional polymorphisms of serotonin transporter (SLC6A4) and monoamine oxidase A (MAOA) on categories of BMI. Participants were from the National Longitudinal Study of Adolescent Health. Multiple logistic regression was used to investigate interactions between candidate genes and depression on risk of obesity (BMI ≥ 30) or overweight + obese combined (BMI ≥ 25). Males with an MAOA active allele with high depressive symptoms were at decreased risk of obesity (OR 0.22; 95% CI 0.06–0.78) and overweight + obesity (OR 0.48; 95% CI 0.26–0.89). No similar effect was observed among females. These findings highlight that the obesity–depression relationship may vary as a function of gender and genetic polymorphism, and suggest the need for further study. Handling editor: Tatiana Foroud.  相似文献   
997.
Objectives The current study examined the role of estrogen receptors (ER), progesterone receptors (PR) and p53 expression in adenoid cystic carcinoma (ACC) to determine if simple expression or possible overexpression of these products might influence the development and natural course of this cancer. Study Design ER and PR status and p53 overexpression were retrospectively evaluated utilizing immunohistochemical evaluation of 47 ACC specimens. Methods Formalin-fixed paraffin-embedded tissues from 47 ACC specimens and 47 samples of normal salivary gland tissue were evaluated histochemically for the presence of ER, PR and p53. Immunoreactivity was scored using a 0 to +3 scale in which staining was either (0) negative, (+1) spotty, (+2) weakly positive, or (+3) strongly positive. Results ER was expressed in 8 of 47 tumors while PR was expressed in 4 of 47 tumors. p53 aberrations were demonstrated in 26 of 47 tumors. Tumors showed varying degrees of immunopositivity ranging from 0 to +3. Conclusions These studies suggest that p53 aberrations may be involved in ACC tumor progression and that ER and PR may play a role in ACC development.  相似文献   
998.
999.
A 21‐year‐old gravida 1, para 0 at 11 weeks and 4/7 days by last normal menstrual period presented to our clinic for prenatal care. She has never had a serious illness, surgery, or hospitalization. Her family history was positive for chronic depression and substance abuse. Her psychological history was positive for bulimia nervosa, which she reported first developing at 18 years of age. Although she had been working with a therapist for the past couple of years, she reported binge eating 1 to 2 times a week and compensatory behaviors, including excessive exercise, laxative use, fasting, and self‐induced vomiting. She denied suicidal and homicidal ideation. She reported that her boyfriend and family provided a good social support system. Over the past few weeks, she had experienced symptoms of fatigue, nausea, and vomiting, but she denied dizziness and hyperemesis. The physical examination revealed that her vital signs were stable, and all systems were found to be normal, with uterine size equal to dates. She measured 5 feet 6 inches tall, with a prepregnancy weight of 127 pounds and a body mass index (BMI) of 20.5. She estimated gaining about 5 pounds since becoming pregnant. Moderate ketones were noted on urine dipstick. Laboratory values ordered at the first prenatal visit and at 28 weeks' gestation were all within normal limits, with the exception of a hemoglobin value of 11.6 and a hematocrit of 33.8 at 28 weeks' gestation, indicating mild anemia. The woman attended clinic regularly and had an uncomplicated prenatal course, gaining a total of 34 pounds. She was offered anticipatory guidance at each antepartum visit and was counseled by her midwife on nutrition and weight gain. She kept bimonthly appointments with her regular therapist throughout the duration of her pregnancy. While she attempted to refrain from binging and compensatory behaviors, she did not completely abstain, reporting an average of 1 to 3 binge eating episodes (followed by self‐induced vomiting or laxative use) per month. She gave birth vaginally to a healthy 8 lb, 5 oz baby boy at 40 weeks and 3/7 days without complications.  相似文献   
1000.
The current study examined clinical correlates and treatment response as they relate to auxiliary clinical characteristics (i.e., insight; avoidance; indecisiveness; sense of responsibility; pervasive slowness; pathological doubt; duration of obsession-free and compulsion-free intervals) in 172 adults with OCD. A trained evaluator administered the Yale-Brown Obsessive Compulsive Scale and the Anxiety Disorders Interview Schedule for DSM-IV. As well, patients completed the Obsessive Compulsive Inventory-Revised; Beck Depression Inventory-Second Edition; State-Trait Anxiety Inventory; RAND 36-Item Health Survey; and Sheehan Disability Scale. Results indicated numerous associations between auxiliary OCD features and both depressive and anxious symptoms as well as impaired health and functioning. All auxiliary features, excluding insight, were reduced following cognitive-behavioral therapy. In particular, changes in symptom-free intervals; avoidance; and indecisiveness were most reliably associated with reductions in core OCD features. The lack of a relationship with insight did not come as a surprise, as insight is considered a relatively stable construct in those with OCD. Implications of these findings in the assessment and treatment of patients with OCD are highlighted.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号