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   13477篇
  免费   1509篇
  国内免费   301篇
耳鼻咽喉   235篇
儿科学   1798篇
妇产科学   387篇
基础医学   1736篇
口腔科学   248篇
临床医学   1344篇
内科学   2705篇
皮肤病学   362篇
神经病学   508篇
特种医学   379篇
外科学   2025篇
综合类   1439篇
预防医学   462篇
眼科学   1158篇
药学   310篇
  6篇
中国医学   96篇
肿瘤学   89篇
  2023年   249篇
  2022年   221篇
  2021年   458篇
  2020年   669篇
  2019年   657篇
  2018年   569篇
  2017年   572篇
  2016年   496篇
  2015年   447篇
  2014年   775篇
  2013年   907篇
  2012年   660篇
  2011年   795篇
  2010年   607篇
  2009年   585篇
  2008年   577篇
  2007年   599篇
  2006年   596篇
  2005年   579篇
  2004年   473篇
  2003年   404篇
  2002年   363篇
  2001年   283篇
  2000年   236篇
  1999年   199篇
  1998年   184篇
  1997年   143篇
  1996年   135篇
  1995年   167篇
  1994年   159篇
  1993年   165篇
  1992年   131篇
  1991年   129篇
  1990年   82篇
  1989年   98篇
  1988年   95篇
  1987年   70篇
  1986年   78篇
  1985年   108篇
  1984年   102篇
  1983年   82篇
  1982年   74篇
  1981年   55篇
  1980年   63篇
  1979年   42篇
  1978年   33篇
  1977年   21篇
  1976年   25篇
  1975年   16篇
  1974年   12篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
ObjectivePregnancies complicated by fetal heart defects often undergo a planned delivery prior to term by either induction of labour or cesarean delivery to ensure optimal availability of neonatal care. We aimed to assess whether such planned deliveries achieve their goal of better perinatal care.MethodsWe conducted a retrospective case-control study of pregnancies complicated by isolated fetal cardiac defects, without other fetal comorbidities, managed at a single fetal medicine unit over a 10-year period. Only pregnancies delivered past 37 weeks gestation were included. Patients undergoing elective delivery for care planning reasons only were compared with patients in whom planned delivery was clinically indicated and patients who laboured spontaneously. Obstetric and perinatal outcomes were recorded.ResultsOf the 180 pregnancies included in the study, 59 (32.8%) were in the elective group, 49 (27.2%), in the indicated group, and 72 (40%), in the spontaneous group. Mean gestational age at delivery was 39.0 ± 1.1 weeks overall and did not differ between the groups. For the elective group, only 35.6% of deliveries occurred during office hours, which was similar to the 2 other groups. The rate of adverse obstetric or postnatal outcomes was not statistically significantly different between groups.ConclusionTimed delivery at term does not seem to be associated with an increased risk of poor perinatal outcomes. It may improve perinatal care by providing proximity to a neonatal intensive care unit and convenience for patients and providers.  相似文献   
2.
《Orthopaedics and Trauma》2022,36(6):304-310
Congenital vertical talus (CVT) is a rare foot deformity that presents with a rigid flat foot at birth. CVT can present as an isolated abnormality in the newborn, however in at least 50% of cases in association with other conditions. Full neuro-axial imaging is essential to detect any associated neurologic problems. Radiographs of the foot, including forced plantar and dorsiflexion laterals, are diagnostic. Gold standard modern treatment uses the Dobbs method of serial manipulation and casting with minimally-invasive stabilization of the talonavicular joint and Achilles tendon tenotomy.  相似文献   
3.
4.
The study aimed to evaluate a new method of periorbital rejuvenation in which periorbital muscle manipulation is utilised. Patients (n = 82) who underwent eyebrow lifting surgery in Yichang Central People's Hospital were retrospectively included. All the patients had drooping eyebrows and lateral hooding of the upper eyelids combined with a flat or depressed outer-upper side of the eyebrow arch. Data were collected on the position of the eyebrow relative to the eye before and after surgery and the postoperative satisfaction of patients. The study included 43 patients in the traditional group and 39 patients in the combined group. The postoperative results showed that the combined approach group had more aesthetically pleasing mean (SD) ratio of the position of eyebrows relative to eyes (1.6 ± 0.2 vs 1.7 ± 0.2, p = 0.021). Furthermore, the satisfaction of the patients in the combined group was significantly higher than that of the traditional group (37/39 vs 34/43, p = 0.036). The periorbital rejuvenation through the sub-brow incision, combined with supraorbital orbicularis muscle folding had more aesthetically pleasing ratio of the position of eyebrows relative to eyes and the satisfaction of the patients in the combined group was significantly higher.  相似文献   
5.
6.
Rationale:Pentalogy of Cantrell (POC) is an extremely rare syndrome with an estimated incidence of 1:65,000 to 200,000 live births. Its complete form includes a midline epigastric abdominal wall defect, defects affecting the lower sternum, anterior diaphragm, diaphragmatic pericardium, and various intracardiac defects.Patient concerns:We report a case of complete POC affecting only the first-born of a set of premature dizygotic twins.Diagnosis:A giant omphalocele with an eviscerated liver and bowel on prenatal, obstetric ultrasonography at 24 gestational weeks was observed. At birth, physical examination confirmed a massive (10 × 8 cm) epigastric omphalocele in which a significant part of the liver was seen. A postnatal echocardiogram revealed the presence of an ostium secundum atrial septal defect, perimembranous ventricular septal defect, and moderate pulmonary stenosis. X-ray showed an abnormal intrathoracic positioned stomach, which was confirmed with a plain x-ray of the upper intestinal tract with hydrosoluble contrast. Computed tomography (CT) scan revealed the sternum''s absence and a close connection between the pericardial sac and the stomach wall.Interventions:The patient underwent surgical intervention at 18 days of age.Outcomes:Despite adequate and appropriate postoperative treatment, the baby rapidly deteriorated and died 72 hours after surgery.Lessons:POC is a complex, high-mortality syndrome whose management requires a multidisciplinary approach and meticulous planning. Despite all efforts, POC carries a poor prognosis, particularly in patients affected by its complete form.  相似文献   
7.
目的探讨不同手术方法治疗复杂胫骨平台骨折临床疗效。方法选择2016年1月—2018年12月84例复杂胫骨平台骨折患者,随机分组。单侧锁定钢板内固定组选择单侧锁定钢板内固定手术,双侧切口双侧解剖钢板内固定组选择双侧切口双侧解剖钢板内固定。分析手术操作时间、手术失血、平均住院天数以及复杂胫骨平台骨折愈合时间;治疗前后患者视觉模拟评分和Rasmussen膝关节功能评分;膝关节僵硬发生率。结果双侧切口双侧解剖钢板内固定组视觉模拟评分和Rasmussen膝关节功能评分、手术操作时间、手术失血、平均住院天数以及复杂胫骨平台骨折愈合时间、膝关节僵硬发生率和单侧锁定钢板内固定组比较有优势,P<0.05。结论复杂胫骨平台骨折患者实施双侧切口双侧解剖钢板内固定可获得较好效果。  相似文献   
8.
9.
10.
The Bailey-Bloch congenital myopathy, also known as Native American myopathy (NAM), is an autosomal recessive congenital myopathy first reported in the Lumbee tribe people settled in North Carolina (USA), and characterized by congenital weakness and arthrogryposis, cleft palate, ptosis, short stature, kyphoscoliosis, talipes deformities, and susceptibility to malignant hyperthermia (MH) triggered by anesthesia. NAM is linked to STAC3 gene coding for a component of excitation-contraction coupling in skeletal muscles. A homozygous missense variant (c.851G > C; p.Trp284Ser) in STAC3 segregated with NAM in the Lumbee families. Non-Native American patients with STAC3 related congenital myopathy, and with other various variants of STAC3 have been reported. Here, we present seven patients from the Comoros Islands (located in the Mozambique Channel) diagnosed with STAC3 related congenital myopathy and having the recurrent variant identified in the Lumbee people. The series is the second largest series of patients having STAC3 related congenital myopathy with a shared ethnicity after le Lumbee series. Local history and geography may explain the overrepresentation of NAM in the Comorian Archipelago with a founder effect. Further researches would be necessary for the understanding of the onset of the NAM in Comorian population as search of the “classical” STAC3 variant in East African population, and haplotypes comparison between Comorian and Lumbee patients.  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